Skip to content

'@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel #3113

Closed
Task
#3118
Closed
'@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel#3113
Task
#3118
Labels
cleanupTech debt, resolving it improves our own velocity

Description

@nikonikolov
nikonikolov
opened on Jul 21, 2025

🐞 bug report

Description

A clear and concise description of the problem...

After updating from bazel 6.5.0 to bazel 8.3.1 and from WORKSPACE to bzlmod I started getting a bunch of warnings which look like the one below. Have I misconfigured my environment or rules_python is using some deprecated code? The relevant part of MODULE.bazel looks like:

bazel_dep(name = "rules_python", version = "1.5.1")
python = use_extension("@rules_python//python/extensions:python.bzl", "python")
python.toolchain(
is_default = True,
python_version = "3.10",
)
pip = use_extension("@rules_python//python/extensions:pip.bzl", "pip")
pip.parse(
hub_name = "pip-build",
python_version = "3.10",
requirements_lock = "//:build_support/python/requirements.txt.lock",
)
use_repo(pip, "pip-build")

🔥 Exception or Error


WARNING: /scratch/nikolay_nikolov/.cache/bazel/_bazel_nikolay_nikolov/79bf5e678fbb2019f1e30944a206f079/external/rules_python++pip+pip-build_310_debugpy/BUILD.bazel:5:20: in _copy_file rule @@rules_python++pip+pip-build_310_debugpy//:_cp
_19_namespace: target '@@rules_python++pip+pip-build_310_debugpy//:_cp_19_namespace' depends on deprecated target '@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel and will be removed in the future. Mi
grate to toolchains or define your own version of this setting

🌍 Your Environment

Operating System:


Distributor ID: Debian
Description: Debian GNU/Linux 13 (trixie)
Release: 13
Codename: trixie

Output of bazel version:


Build label: 8.3.1
Build target: @@//src/main/java/com/google/devtools/build/lib/bazel:BazelServer
Build time: Mon Jun 30 16:23:40 2025 (1751300620)
Build timestamp: 1751300620
Build timestamp as int: 1751300620

Rules_python version:


1.5.1

Anything else relevant?

Metadata

Metadata

Assignees

No one assigned

    Labels

    cleanupTech debt, resolving it improves our own velocity

    Type

    Task

    Projects

    No projects

      Milestone

      No milestone

      Relationships

      None yet

      Development

      No branches or pull requests

      Issue actions

      , 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
       blocks
(function() {
function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;
codeBlock.parentElement.setAttribute('data-copy-added', 'true');
var btn = document.createElement('button');
btn.textContent = 'Copy';
btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';
btn.onmouseover = function() { this.style.opacity = '1'; };
btn.onmouseout = function() { this.style.opacity = '0.7'; };
btn.onclick = function() {
navigator.clipboard.writeText(codeBlock.textContent).then(function() {
btn.textContent = 'Copied!';
setTimeout(function() { btn.textContent = 'Copy'; }, 1500);
});
};
codeBlock.parentElement.style.position = 'relative';
codeBlock.parentElement.appendChild(btn);
});
}
addCopyButtons();
// Re-run on dynamic content
var observer = new MutationObserver(addCopyButtons);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
'@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel · Issue #3113 · bazel-contrib/rules_python · GitHub
      Skip to content
      '@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel #3113
      Closed
      Task
      #3118
      Closed
      '@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel#3113
      Task
      #3118
      Labels
      cleanupTech debt, resolving it improves our own velocity
      Description
      @nikonikolov
      nikonikolov
      opened on Jul 21, 2025
      🐞 bug report
      Description
      
A clear and concise description of the problem...

      After updating from bazel 6.5.0 to bazel 8.3.1 and from WORKSPACE to bzlmod I started getting a bunch of warnings which look like the one below. Have I misconfigured my environment or rules_python is using some deprecated code? The relevant part of MODULE.bazel looks like:
      bazel_dep(name = "rules_python", version = "1.5.1")
python = use_extension("@rules_python//python/extensions:python.bzl", "python")
python.toolchain(
is_default = True,
python_version = "3.10",
)
pip = use_extension("@rules_python//python/extensions:pip.bzl", "pip")
pip.parse(
hub_name = "pip-build",
python_version = "3.10",
requirements_lock = "//:build_support/python/requirements.txt.lock",
)
use_repo(pip, "pip-build")

      🔥 Exception or Error
      
WARNING: /scratch/nikolay_nikolov/.cache/bazel/_bazel_nikolay_nikolov/79bf5e678fbb2019f1e30944a206f079/external/rules_python++pip+pip-build_310_debugpy/BUILD.bazel:5:20: in _copy_file rule @@rules_python++pip+pip-build_310_debugpy//:_cp
_19_namespace: target '@@rules_python++pip+pip-build_310_debugpy//:_cp_19_namespace' depends on deprecated target '@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel and will be removed in the future. Mi
grate to toolchains or define your own version of this setting

      🌍 Your Environment
      Operating System:
      
Distributor ID: Debian
Description: Debian GNU/Linux 13 (trixie)
Release: 13
Codename: trixie

      Output of bazel version:
      
Build label: 8.3.1
Build target: @@//src/main/java/com/google/devtools/build/lib/bazel:BazelServer
Build time: Mon Jun 30 16:23:40 2025 (1751300620)
Build timestamp: 1751300620
Build timestamp as int: 1751300620

      Rules_python version:
      
1.5.1

      Anything else relevant?
      Metadata
      Metadata
      Assignees
      No one assigned
        Labels
        cleanupTech debt, resolving it improves our own velocity
        Type
        Task
        Projects
        No projects
          Milestone
          No milestone
          Relationships
          None yet
          Development
          No branches or pull requests
          Issue actions
          
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Force GitHub README to respect dark mode
(function() {
var style = document.createElement('style');
style.textContent = '
.markdown-body {
color-scheme: dark light;
}
.markdown-body pre { background: #161b22 !important; }
.markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }
.markdown-body table th, .markdown-body table td { border-color: #30363d !important; }
.markdown-body img { background: #0d1117; }
.markdown-body blockquote { border-left-color: #8b949e; }
.markdown-body hr { border-color: #30363d; }
';
document.head.appendChild(style);
})();
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
'@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel · Issue #3113 · bazel-contrib/rules_python · GitHub
          Skip to content
          '@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel #3113
          Closed
          Task
          #3118
          Closed
          '@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel#3113
          Task
          #3118
          Labels
          cleanupTech debt, resolving it improves our own velocity
          Description
          @nikonikolov
          nikonikolov
          opened on Jul 21, 2025
          🐞 bug report
          Description
          
A clear and concise description of the problem...

          After updating from bazel 6.5.0 to bazel 8.3.1 and from WORKSPACE to bzlmod I started getting a bunch of warnings which look like the one below. Have I misconfigured my environment or rules_python is using some deprecated code? The relevant part of MODULE.bazel looks like:
          bazel_dep(name = "rules_python", version = "1.5.1")
python = use_extension("@rules_python//python/extensions:python.bzl", "python")
python.toolchain(
is_default = True,
python_version = "3.10",
)
pip = use_extension("@rules_python//python/extensions:pip.bzl", "pip")
pip.parse(
hub_name = "pip-build",
python_version = "3.10",
requirements_lock = "//:build_support/python/requirements.txt.lock",
)
use_repo(pip, "pip-build")

          🔥 Exception or Error
          
WARNING: /scratch/nikolay_nikolov/.cache/bazel/_bazel_nikolay_nikolov/79bf5e678fbb2019f1e30944a206f079/external/rules_python++pip+pip-build_310_debugpy/BUILD.bazel:5:20: in _copy_file rule @@rules_python++pip+pip-build_310_debugpy//:_cp
_19_namespace: target '@@rules_python++pip+pip-build_310_debugpy//:_cp_19_namespace' depends on deprecated target '@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel and will be removed in the future. Mi
grate to toolchains or define your own version of this setting

          🌍 Your Environment
          Operating System:
          
Distributor ID: Debian
Description: Debian GNU/Linux 13 (trixie)
Release: 13
Codename: trixie

          Output of bazel version:
          
Build label: 8.3.1
Build target: @@//src/main/java/com/google/devtools/build/lib/bazel:BazelServer
Build time: Mon Jun 30 16:23:40 2025 (1751300620)
Build timestamp: 1751300620
Build timestamp as int: 1751300620

          Rules_python version:
          
1.5.1

          Anything else relevant?
          Metadata
          Metadata
          Assignees
          No one assigned
            Labels
            cleanupTech debt, resolving it improves our own velocity
            Type
            Task
            Projects
            No projects
              Milestone
              No milestone
              Relationships
              None yet
              Development
              No branches or pull requests
              Issue actions
              
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
var url = new URL(ref);
var q = url.searchParams.get('q') || url.searchParams.get('p');
if (q) {
terms = q.split(/\s+/).filter(function(t) { return t.length > 2; });
}
}
if (terms.length === 0) return;
var style = document.createElement('style');
style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';
document.head.appendChild(style);
function highlight(node) {
if (node.nodeType === 3) { // text node
var text = node.textContent;
var found = false;
terms.forEach(function(term) {
var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi');
if (regex.test(text)) {
found = true;
var frag = document.createDocumentFragment();
var parts = text.split(regex);
parts.forEach(function(part, i) {
if (i % 2 === 0) {
frag.appendChild(document.createTextNode(part));
} else {
var span = document.createElement('span');
span.className = 'userscript-highlight';
span.textContent = part;
frag.appendChild(span);
}
});
node.parentNode.replaceChild(frag, node);
}
});
} else if (node.nodeType === 1 && node.childNodes) { // element
var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];
if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
}
}
}
highlight(document.body);
// Re-highlight on dynamic content
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
'@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel · Issue #3113 · bazel-contrib/rules_python · GitHub
              Skip to content
              '@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel #3113
              Closed
              Task
              #3118
              Closed
              '@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel#3113
              Task
              #3118
              Labels
              cleanupTech debt, resolving it improves our own velocity
              Description
              @nikonikolov
              nikonikolov
              opened on Jul 21, 2025
              🐞 bug report
              Description
              
A clear and concise description of the problem...

              After updating from bazel 6.5.0 to bazel 8.3.1 and from WORKSPACE to bzlmod I started getting a bunch of warnings which look like the one below. Have I misconfigured my environment or rules_python is using some deprecated code? The relevant part of MODULE.bazel looks like:
              bazel_dep(name = "rules_python", version = "1.5.1")
python = use_extension("@rules_python//python/extensions:python.bzl", "python")
python.toolchain(
is_default = True,
python_version = "3.10",
)
pip = use_extension("@rules_python//python/extensions:pip.bzl", "pip")
pip.parse(
hub_name = "pip-build",
python_version = "3.10",
requirements_lock = "//:build_support/python/requirements.txt.lock",
)
use_repo(pip, "pip-build")

              🔥 Exception or Error
              
WARNING: /scratch/nikolay_nikolov/.cache/bazel/_bazel_nikolay_nikolov/79bf5e678fbb2019f1e30944a206f079/external/rules_python++pip+pip-build_310_debugpy/BUILD.bazel:5:20: in _copy_file rule @@rules_python++pip+pip-build_310_debugpy//:_cp
_19_namespace: target '@@rules_python++pip+pip-build_310_debugpy//:_cp_19_namespace' depends on deprecated target '@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel and will be removed in the future. Mi
grate to toolchains or define your own version of this setting

              🌍 Your Environment
              Operating System:
              
Distributor ID: Debian
Description: Debian GNU/Linux 13 (trixie)
Release: 13
Codename: trixie

              Output of bazel version:
              
Build label: 8.3.1
Build target: @@//src/main/java/com/google/devtools/build/lib/bazel:BazelServer
Build time: Mon Jun 30 16:23:40 2025 (1751300620)
Build timestamp: 1751300620
Build timestamp as int: 1751300620

              Rules_python version:
              
1.5.1

              Anything else relevant?
              Metadata
              Metadata
              Assignees
              No one assigned
                Labels
                cleanupTech debt, resolving it improves our own velocity
                Type
                Task
                Projects
                No projects
                  Milestone
                  No milestone
                  Relationships
                  None yet
                  Development
                  No branches or pull requests
                  Issue actions
                  
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
'@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel · Issue #3113 · bazel-contrib/rules_python · GitHub
                  Skip to content
                  '@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel #3113
                  Closed
                  Task
                  #3118
                  Closed
                  '@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel#3113
                  Task
                  #3118
                  Labels
                  cleanupTech debt, resolving it improves our own velocity
                  Description
                  @nikonikolov
                  nikonikolov
                  opened on Jul 21, 2025
                  🐞 bug report
                  Description
                  
A clear and concise description of the problem...

                  After updating from bazel 6.5.0 to bazel 8.3.1 and from WORKSPACE to bzlmod I started getting a bunch of warnings which look like the one below. Have I misconfigured my environment or rules_python is using some deprecated code? The relevant part of MODULE.bazel looks like:
                  bazel_dep(name = "rules_python", version = "1.5.1")
python = use_extension("@rules_python//python/extensions:python.bzl", "python")
python.toolchain(
is_default = True,
python_version = "3.10",
)
pip = use_extension("@rules_python//python/extensions:pip.bzl", "pip")
pip.parse(
hub_name = "pip-build",
python_version = "3.10",
requirements_lock = "//:build_support/python/requirements.txt.lock",
)
use_repo(pip, "pip-build")

                  🔥 Exception or Error
                  
WARNING: /scratch/nikolay_nikolov/.cache/bazel/_bazel_nikolay_nikolov/79bf5e678fbb2019f1e30944a206f079/external/rules_python++pip+pip-build_310_debugpy/BUILD.bazel:5:20: in _copy_file rule @@rules_python++pip+pip-build_310_debugpy//:_cp
_19_namespace: target '@@rules_python++pip+pip-build_310_debugpy//:_cp_19_namespace' depends on deprecated target '@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel and will be removed in the future. Mi
grate to toolchains or define your own version of this setting

                  🌍 Your Environment
                  Operating System:
                  
Distributor ID: Debian
Description: Debian GNU/Linux 13 (trixie)
Release: 13
Codename: trixie

                  Output of bazel version:
                  
Build label: 8.3.1
Build target: @@//src/main/java/com/google/devtools/build/lib/bazel:BazelServer
Build time: Mon Jun 30 16:23:40 2025 (1751300620)
Build timestamp: 1751300620
Build timestamp as int: 1751300620

                  Rules_python version:
                  
1.5.1

                  Anything else relevant?
                  Metadata
                  Metadata
                  Assignees
                  No one assigned
                    Labels
                    cleanupTech debt, resolving it improves our own velocity
                    Type
                    Task
                    Projects
                    No projects
                      Milestone
                      No milestone
                      Relationships
                      None yet
                      Development
                      No branches or pull requests
                      Issue actions
                      
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
'@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel · Issue #3113 · bazel-contrib/rules_python · GitHub
                      Skip to content
                      '@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel #3113
                      Closed
                      Task
                      #3118
                      Closed
                      '@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel#3113
                      Task
                      #3118
                      Labels
                      cleanupTech debt, resolving it improves our own velocity
                      Description
                      @nikonikolov
                      nikonikolov
                      opened on Jul 21, 2025
                      🐞 bug report
                      Description
                      
A clear and concise description of the problem...

                      After updating from bazel 6.5.0 to bazel 8.3.1 and from WORKSPACE to bzlmod I started getting a bunch of warnings which look like the one below. Have I misconfigured my environment or rules_python is using some deprecated code? The relevant part of MODULE.bazel looks like:
                      bazel_dep(name = "rules_python", version = "1.5.1")
python = use_extension("@rules_python//python/extensions:python.bzl", "python")
python.toolchain(
is_default = True,
python_version = "3.10",
)
pip = use_extension("@rules_python//python/extensions:pip.bzl", "pip")
pip.parse(
hub_name = "pip-build",
python_version = "3.10",
requirements_lock = "//:build_support/python/requirements.txt.lock",
)
use_repo(pip, "pip-build")

                      🔥 Exception or Error
                      
WARNING: /scratch/nikolay_nikolov/.cache/bazel/_bazel_nikolay_nikolov/79bf5e678fbb2019f1e30944a206f079/external/rules_python++pip+pip-build_310_debugpy/BUILD.bazel:5:20: in _copy_file rule @@rules_python++pip+pip-build_310_debugpy//:_cp
_19_namespace: target '@@rules_python++pip+pip-build_310_debugpy//:_cp_19_namespace' depends on deprecated target '@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel and will be removed in the future. Mi
grate to toolchains or define your own version of this setting

                      🌍 Your Environment
                      Operating System:
                      
Distributor ID: Debian
Description: Debian GNU/Linux 13 (trixie)
Release: 13
Codename: trixie

                      Output of bazel version:
                      
Build label: 8.3.1
Build target: @@//src/main/java/com/google/devtools/build/lib/bazel:BazelServer
Build time: Mon Jun 30 16:23:40 2025 (1751300620)
Build timestamp: 1751300620
Build timestamp as int: 1751300620

                      Rules_python version:
                      
1.5.1

                      Anything else relevant?
                      Metadata
                      Metadata
                      Assignees
                      No one assigned
                        Labels
                        cleanupTech debt, resolving it improves our own velocity
                        Type
                        Task
                        Projects
                        No projects
                          Milestone
                          No milestone
                          Relationships
                          None yet
                          Development
                          No branches or pull requests
                          Issue actions
                          
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
'@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel · Issue #3113 · bazel-contrib/rules_python · GitHub
                          Skip to content
                          '@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel #3113
                          Closed
                          Task
                          #3118
                          Closed
                          '@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel#3113
                          Task
                          #3118
                          Labels
                          cleanupTech debt, resolving it improves our own velocity
                          Description
                          @nikonikolov
                          nikonikolov
                          opened on Jul 21, 2025
                          🐞 bug report
                          Description
                          
A clear and concise description of the problem...

                          After updating from bazel 6.5.0 to bazel 8.3.1 and from WORKSPACE to bzlmod I started getting a bunch of warnings which look like the one below. Have I misconfigured my environment or rules_python is using some deprecated code? The relevant part of MODULE.bazel looks like:
                          bazel_dep(name = "rules_python", version = "1.5.1")
python = use_extension("@rules_python//python/extensions:python.bzl", "python")
python.toolchain(
is_default = True,
python_version = "3.10",
)
pip = use_extension("@rules_python//python/extensions:pip.bzl", "pip")
pip.parse(
hub_name = "pip-build",
python_version = "3.10",
requirements_lock = "//:build_support/python/requirements.txt.lock",
)
use_repo(pip, "pip-build")

                          🔥 Exception or Error
                          
WARNING: /scratch/nikolay_nikolov/.cache/bazel/_bazel_nikolay_nikolov/79bf5e678fbb2019f1e30944a206f079/external/rules_python++pip+pip-build_310_debugpy/BUILD.bazel:5:20: in _copy_file rule @@rules_python++pip+pip-build_310_debugpy//:_cp
_19_namespace: target '@@rules_python++pip+pip-build_310_debugpy//:_cp_19_namespace' depends on deprecated target '@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel and will be removed in the future. Mi
grate to toolchains or define your own version of this setting

                          🌍 Your Environment
                          Operating System:
                          
Distributor ID: Debian
Description: Debian GNU/Linux 13 (trixie)
Release: 13
Codename: trixie

                          Output of bazel version:
                          
Build label: 8.3.1
Build target: @@//src/main/java/com/google/devtools/build/lib/bazel:BazelServer
Build time: Mon Jun 30 16:23:40 2025 (1751300620)
Build timestamp: 1751300620
Build timestamp as int: 1751300620

                          Rules_python version:
                          
1.5.1

                          Anything else relevant?
                          Metadata
                          Metadata
                          Assignees
                          No one assigned
                            Labels
                            cleanupTech debt, resolving it improves our own velocity
                            Type
                            Task
                            Projects
                            No projects
                              Milestone
                              No milestone
                              Relationships
                              None yet
                              Development
                              No branches or pull requests
                              Issue actions
                              
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();
'@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel · Issue #3113 · bazel-contrib/rules_python · GitHub
                              Skip to content
                              '@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel #3113
                              Closed
                              Task
                              #3118
                              Closed
                              '@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel#3113
                              Task
                              #3118
                              Labels
                              cleanupTech debt, resolving it improves our own velocity
                              Description
                              @nikonikolov
                              nikonikolov
                              opened on Jul 21, 2025
                              🐞 bug report
                              Description
                              
A clear and concise description of the problem...

                              After updating from bazel 6.5.0 to bazel 8.3.1 and from WORKSPACE to bzlmod I started getting a bunch of warnings which look like the one below. Have I misconfigured my environment or rules_python is using some deprecated code? The relevant part of MODULE.bazel looks like:
                              bazel_dep(name = "rules_python", version = "1.5.1")
python = use_extension("@rules_python//python/extensions:python.bzl", "python")
python.toolchain(
is_default = True,
python_version = "3.10",
)
pip = use_extension("@rules_python//python/extensions:pip.bzl", "pip")
pip.parse(
hub_name = "pip-build",
python_version = "3.10",
requirements_lock = "//:build_support/python/requirements.txt.lock",
)
use_repo(pip, "pip-build")

                              🔥 Exception or Error
                              
WARNING: /scratch/nikolay_nikolov/.cache/bazel/_bazel_nikolay_nikolov/79bf5e678fbb2019f1e30944a206f079/external/rules_python++pip+pip-build_310_debugpy/BUILD.bazel:5:20: in _copy_file rule @@rules_python++pip+pip-build_310_debugpy//:_cp
_19_namespace: target '@@rules_python++pip+pip-build_310_debugpy//:_cp_19_namespace' depends on deprecated target '@@bazel_tools//src/conditions:host_windows_x64_constraint': No longer used by Bazel and will be removed in the future. Mi
grate to toolchains or define your own version of this setting

                              🌍 Your Environment
                              Operating System:
                              
Distributor ID: Debian
Description: Debian GNU/Linux 13 (trixie)
Release: 13
Codename: trixie

                              Output of bazel version:
                              
Build label: 8.3.1
Build target: @@//src/main/java/com/google/devtools/build/lib/bazel:BazelServer
Build time: Mon Jun 30 16:23:40 2025 (1751300620)
Build timestamp: 1751300620
Build timestamp as int: 1751300620

                              Rules_python version:
                              
1.5.1

                              Anything else relevant?
                              Metadata
                              Metadata
                              Assignees
                              No one assigned
                                Labels
                                cleanupTech debt, resolving it improves our own velocity
                                Type
                                Task
                                Projects
                                No projects
                                  Milestone
                                  No milestone
                                  Relationships
                                  None yet
                                  Development
                                  No branches or pull requests
                                  Issue actions