diff --git a/stl/aliases/arm64ec/std_init_once_begin_initialize.obj b/stl/aliases/arm64ec/std_init_once_begin_initialize.obj
index 593e6c144ab..431291f2f90 100644
Binary files a/stl/aliases/arm64ec/std_init_once_begin_initialize.obj and b/stl/aliases/arm64ec/std_init_once_begin_initialize.obj differ
diff --git a/stl/aliases/arm64ec/std_init_once_complete.obj b/stl/aliases/arm64ec/std_init_once_complete.obj
index 35149685437..363bfe340e5 100644
Binary files a/stl/aliases/arm64ec/std_init_once_complete.obj and b/stl/aliases/arm64ec/std_init_once_complete.obj differ
diff --git a/stl/aliases/generate.cmd b/stl/aliases/generate.cmd
index afad08f9bd9..12cb87b3bc2 100644
--- a/stl/aliases/generate.cmd
+++ b/stl/aliases/generate.cmd
@@ -44,8 +44,7 @@ mkdir arm64ec
   chpe\std_init_once_begin_initialize.obj
 ..\..\..\..\..\tools\amd64\aliasobj.exe ^
   /machine:arm64ec ^
-  __imp___std_init_once_begin_initialize ^
-  __imp_InitOnceBeginInitialize ^
+  -m std_init_once_begin_initialize-arm64ec.txt ^
   arm64ec\std_init_once_begin_initialize.obj
 
 :: __std_init_once_complete
@@ -72,6 +71,5 @@ mkdir arm64ec
   chpe\std_init_once_complete.obj
 ..\..\..\..\..\tools\amd64\aliasobj.exe ^
   /machine:arm64ec ^
-  __imp___std_init_once_complete ^
-  __imp_InitOnceComplete ^
+  -m std_init_once_complete-arm64ec.txt ^
   arm64ec\std_init_once_complete.obj
diff --git a/stl/aliases/std_init_once_begin_initialize-arm64ec.txt b/stl/aliases/std_init_once_begin_initialize-arm64ec.txt
new file mode 100644
index 00000000000..3431bdf51cf
--- /dev/null
+++ b/stl/aliases/std_init_once_begin_initialize-arm64ec.txt
@@ -0,0 +1,2 @@
+#__std_init_once_begin_initialize #InitOnceBeginInitialize
+__imp___std_init_once_begin_initialize __imp_InitOnceBeginInitialize
diff --git a/stl/aliases/std_init_once_complete-arm64ec.txt b/stl/aliases/std_init_once_complete-arm64ec.txt
new file mode 100644
index 00000000000..4a146c7abfc
--- /dev/null
+++ b/stl/aliases/std_init_once_complete-arm64ec.txt
@@ -0,0 +1,2 @@
+#__std_init_once_complete #InitOnceComplete
+__imp___std_init_once_complete __imp_InitOnceComplete
diff --git a/stl/msbuild/stl_1/stl_1.files.settings.targets b/stl/msbuild/stl_1/stl_1.files.settings.targets
index 7c36449ea49..8c423bd34ec 100644
--- a/stl/msbuild/stl_1/stl_1.files.settings.targets
+++ b/stl/msbuild/stl_1/stl_1.files.settings.targets
@@ -11,7 +11,6 @@ SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
             ">
             <BuildAs>nativecpp</BuildAs>
         </BuildFiles>
-        <Link Condition="'$(Arm64X)' == 'true'" Include="$(IntermediateOutputDirectoryEC)\memory_resource.obj;"/>
         <BuildFiles Condition="'$(CrtBuildModelIsDll)' == 'true'" Include="
             $(CrtRoot)\github\stl\src\dllmain_satellite.cpp;
             ">
diff --git a/stl/msbuild/stl_2/msvcp_2.settings.targets b/stl/msbuild/stl_2/msvcp_2.settings.targets
index afcc4c12419..79540664211 100644
--- a/stl/msbuild/stl_2/msvcp_2.settings.targets
+++ b/stl/msbuild/stl_2/msvcp_2.settings.targets
@@ -36,8 +36,6 @@ SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
         <IntermediateImportLibOutput>$(CrtBuildDir)\msvcprt_2$(BuildSuffix).$(MsvcpFlavor).import_only.lib</IntermediateImportLibOutput>
         <DllDefName>$(LibOutputFileName).$(MsvcpFlavor)</DllDefName>
         <DllDef>$(IntermediateOutputDirectory)\$(DllDefName).def</DllDef>
-        <DllDef Condition="'$(Arm64X)' == 'true'">$(IntermediateOutputDirectoryEC)\$(DllDefName).def</DllDef>
-        <DllDefArm64Native Condition="'$(Arm64X)' == 'true'">$(IntermediateOutputDirectory)\$(DllDefName).def</DllDefArm64Native>
 
         <LinkGenerateDebugInformation Condition="'$(BLD_REL_NO_DBINFO)' != '1'">true</LinkGenerateDebugInformation>
         <LinkProgramDataBaseFileName Condition="'$(BLD_REL_NO_DBINFO)' != '1'">$(OutputPath)\$(OutputName)$(_PDB_VER_NAME_)$(DllPdbFlavorSuffix)</LinkProgramDataBaseFileName>
diff --git a/stl/msbuild/stl_2/stl_2.files.settings.targets b/stl/msbuild/stl_2/stl_2.files.settings.targets
index 0b5a57a2c3d..4f28e08a72d 100644
--- a/stl/msbuild/stl_2/stl_2.files.settings.targets
+++ b/stl/msbuild/stl_2/stl_2.files.settings.targets
@@ -11,7 +11,6 @@ SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
             ">
             <BuildAs>nativecpp</BuildAs>
         </BuildFiles>
-        <Link Condition="'$(Arm64X)' == 'true'" Include="$(IntermediateOutputDirectoryEC)\special_math.obj;"/>
         <BuildFiles Condition="'$(CrtBuildModelIsDll)' == 'true'" Include="
             $(CrtRoot)\github\stl\src\dllmain_satellite.cpp;
             ">
diff --git a/stl/msbuild/stl_atomic_wait/stl_atomic_wait.files.settings.targets b/stl/msbuild/stl_atomic_wait/stl_atomic_wait.files.settings.targets
index 05ac026443d..e7cc52c398d 100644
--- a/stl/msbuild/stl_atomic_wait/stl_atomic_wait.files.settings.targets
+++ b/stl/msbuild/stl_atomic_wait/stl_atomic_wait.files.settings.targets
@@ -17,21 +17,4 @@ SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
             <BuildAs>nativecpp</BuildAs>
         </BuildFiles>
     </ItemGroup>
-
-    <!-- Specifying EC compilation objs for the cpp files from above -->
-    <PropertyGroup>
-        <ECObjs>
-            $(IntermediateOutputDirectoryEC)\atomic_wait.obj;
-            $(IntermediateOutputDirectoryEC)\parallel_algorithms.obj;
-        </ECObjs>
-    </PropertyGroup>
-
-    <ItemGroup Condition="'$(Arm64X)' == 'true' and '$(TargetNetFx)' != 'true'">
-        <!-- Add EC symbols to import lib -->
-        <ImportLib Include="$(ECObjs)" />
-        <Link Include="$(ECObjs)"/>
-        <Link Condition="'$(CrtBuildModelIsDll)' == 'true'" Include="
-        $(IntermediateOutputDirectoryEC)\dllmain_satellite.obj;
-        "/>
-    </ItemGroup>
 </Project>
diff --git a/stl/msbuild/stl_base/libcp.settings.targets b/stl/msbuild/stl_base/libcp.settings.targets
index 336c34ac84c..d9cbf1677a9 100644
--- a/stl/msbuild/stl_base/libcp.settings.targets
+++ b/stl/msbuild/stl_base/libcp.settings.targets
@@ -32,10 +32,6 @@ SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
     <Import Project="$(MSBuildThisFileDirectory)\stl.files.settings.targets"/>
 
-    <ItemGroup>
-        <Lib Condition="'$(Arm64X)' == 'true'" Include="$(IntermediateOutputDirectoryEC)\%2A.obj;"/>
-    </ItemGroup>
-
     <Import Project="$(VCToolsRootPath)\crt\crt_build.targets"/>
     <Target Name="GetBaseAddress"/>
 
diff --git a/stl/msbuild/stl_base/msvcp.settings.targets b/stl/msbuild/stl_base/msvcp.settings.targets
index 1155276faab..3dec66549c7 100644
--- a/stl/msbuild/stl_base/msvcp.settings.targets
+++ b/stl/msbuild/stl_base/msvcp.settings.targets
@@ -39,8 +39,6 @@ SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
         <IntermediateImportLibOutput>$(CrtBuildDir)\msvcprt_base$(BuildSuffix).$(MsvcpFlavor).import_only.lib</IntermediateImportLibOutput>
         <DllDefName>$(LibOutputFileName).$(MsvcpFlavor)</DllDefName>
         <DllDef>$(IntermediateOutputDirectory)\$(DllDefName).def</DllDef>
-        <DllDef Condition="'$(Arm64X)' == 'true'">$(IntermediateOutputDirectoryEC)\$(DllDefName).def</DllDef>
-        <DllDefArm64Native Condition="'$(Arm64X)' == 'true'">$(IntermediateOutputDirectory)\$(DllDefName).def</DllDefArm64Native>
         <ClDefines Condition="'$(DependsOnConcRT)' == 'true'">$(ClDefines);_STL_CONCRT_SUPPORT</ClDefines>
 
         <LinkGenerateDebugInformation Condition="'$(BLD_REL_NO_DBINFO)' != '1'">true</LinkGenerateDebugInformation>
@@ -89,292 +87,6 @@ SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
     <Import Project="$(MSBuildThisFileDirectory)\stl.files.settings.targets"/>
 
-    <!-- Note: semicolons must be included after ".obj"; otherwise msbuild doesn't build it -->
-    <PropertyGroup>
-        <ECImportLibObjs>
-            $(IntermediateOutputDirectoryEC)\_tolower.obj;
-            $(IntermediateOutputDirectoryEC)\_toupper.obj;
-            $(IntermediateOutputDirectoryEC)\atomic.obj;
-            $(IntermediateOutputDirectoryEC)\cthread.obj;
-            $(IntermediateOutputDirectoryEC)\xnotify.obj;
-            $(IntermediateOutputDirectoryEC)\xtime.obj;
-            $(IntermediateOutputDirectoryEC)\xcosh.obj;
-            $(IntermediateOutputDirectoryEC)\xdint.obj;
-            $(IntermediateOutputDirectoryEC)\xdnorm.obj;
-            $(IntermediateOutputDirectoryEC)\xdscale.obj;
-            $(IntermediateOutputDirectoryEC)\xdtento.obj;
-            $(IntermediateOutputDirectoryEC)\xdtest.obj;
-            $(IntermediateOutputDirectoryEC)\xdunscal.obj;
-            $(IntermediateOutputDirectoryEC)\xexp.obj;
-            $(IntermediateOutputDirectoryEC)\xfcosh.obj;
-            $(IntermediateOutputDirectoryEC)\xfdint.obj;
-            $(IntermediateOutputDirectoryEC)\xfdnorm.obj;
-            $(IntermediateOutputDirectoryEC)\xfdscale.obj;
-            $(IntermediateOutputDirectoryEC)\xfdtento.obj;
-            $(IntermediateOutputDirectoryEC)\xfdtest.obj;
-            $(IntermediateOutputDirectoryEC)\xfdunsca.obj;
-            $(IntermediateOutputDirectoryEC)\xferaise.obj;
-            $(IntermediateOutputDirectoryEC)\xfexp.obj;
-            $(IntermediateOutputDirectoryEC)\xfprec.obj;
-            $(IntermediateOutputDirectoryEC)\xfsinh.obj;
-            $(IntermediateOutputDirectoryEC)\xfvalues.obj;
-            $(IntermediateOutputDirectoryEC)\xgetwctype.obj;
-            $(IntermediateOutputDirectoryEC)\xlcosh.obj;
-            $(IntermediateOutputDirectoryEC)\xldint.obj;
-            $(IntermediateOutputDirectoryEC)\xldscale.obj;
-            $(IntermediateOutputDirectoryEC)\xldtento.obj;
-            $(IntermediateOutputDirectoryEC)\xldtest.obj;
-            $(IntermediateOutputDirectoryEC)\xldunsca.obj;
-            $(IntermediateOutputDirectoryEC)\xlexp.obj;
-            $(IntermediateOutputDirectoryEC)\xlpoly.obj;
-            $(IntermediateOutputDirectoryEC)\xlprec.obj;
-            $(IntermediateOutputDirectoryEC)\xlsinh.obj;
-            $(IntermediateOutputDirectoryEC)\xlvalues.obj;
-            $(IntermediateOutputDirectoryEC)\xmbtowc.obj;
-            $(IntermediateOutputDirectoryEC)\xmtx.obj;
-            $(IntermediateOutputDirectoryEC)\xpoly.obj;
-            $(IntermediateOutputDirectoryEC)\xprec.obj;
-            $(IntermediateOutputDirectoryEC)\xsinh.obj;
-            $(IntermediateOutputDirectoryEC)\xstod.obj;
-            $(IntermediateOutputDirectoryEC)\xstof.obj;
-            $(IntermediateOutputDirectoryEC)\xstoflt.obj;
-            $(IntermediateOutputDirectoryEC)\xstol.obj;
-            $(IntermediateOutputDirectoryEC)\xstold.obj;
-            $(IntermediateOutputDirectoryEC)\xstoll.obj;
-            $(IntermediateOutputDirectoryEC)\xstopfx.obj;
-            $(IntermediateOutputDirectoryEC)\xstoul.obj;
-            $(IntermediateOutputDirectoryEC)\xstoull.obj;
-            $(IntermediateOutputDirectoryEC)\xstoxflt.obj;
-            $(IntermediateOutputDirectoryEC)\xstrcoll.obj;
-            $(IntermediateOutputDirectoryEC)\xstrxfrm.obj;
-            $(IntermediateOutputDirectoryEC)\xtowlower.obj;
-            $(IntermediateOutputDirectoryEC)\xtowupper.obj;
-            $(IntermediateOutputDirectoryEC)\xvalues.obj;
-            $(IntermediateOutputDirectoryEC)\xwcscoll.obj;
-            $(IntermediateOutputDirectoryEC)\xwcsxfrm.obj;
-            $(IntermediateOutputDirectoryEC)\xwctomb.obj;
-            $(IntermediateOutputDirectoryEC)\xwstod.obj;
-            $(IntermediateOutputDirectoryEC)\xwstof.obj;
-            $(IntermediateOutputDirectoryEC)\xwstoflt.obj;
-            $(IntermediateOutputDirectoryEC)\xwstold.obj;
-            $(IntermediateOutputDirectoryEC)\xwstopfx.obj;
-            $(IntermediateOutputDirectoryEC)\xwstoxfl.obj;
-            $(IntermediateOutputDirectoryEC)\excptptr.obj;
-            $(IntermediateOutputDirectoryEC)\StlCompareStringA.obj;
-            $(IntermediateOutputDirectoryEC)\StlCompareStringW.obj;
-            $(IntermediateOutputDirectoryEC)\StlLCMapStringA.obj;
-            $(IntermediateOutputDirectoryEC)\StlLCMapStringW.obj;
-            $(IntermediateOutputDirectoryEC)\winapinls.obj;
-            $(IntermediateOutputDirectoryEC)\cerr.obj;
-            $(IntermediateOutputDirectoryEC)\cin.obj;
-            $(IntermediateOutputDirectoryEC)\clog.obj;
-            $(IntermediateOutputDirectoryEC)\cout.obj;
-            $(IntermediateOutputDirectoryEC)\filesys.obj;
-            $(IntermediateOutputDirectoryEC)\fiopen.obj;
-            $(IntermediateOutputDirectoryEC)\future.obj;
-            $(IntermediateOutputDirectoryEC)\iomanip.obj;
-            $(IntermediateOutputDirectoryEC)\ios.obj;
-            $(IntermediateOutputDirectoryEC)\iosptrs.obj;
-            $(IntermediateOutputDirectoryEC)\iostream.obj;
-            $(IntermediateOutputDirectoryEC)\locale.obj;
-            $(IntermediateOutputDirectoryEC)\locale0.obj;
-            $(IntermediateOutputDirectoryEC)\multprec.obj;
-            $(IntermediateOutputDirectoryEC)\raisehan.obj;
-            $(IntermediateOutputDirectoryEC)\stdhndlr.obj;
-            $(IntermediateOutputDirectoryEC)\stdthrow.obj;
-            $(IntermediateOutputDirectoryEC)\syserror.obj;
-            $(IntermediateOutputDirectoryEC)\cond.obj;
-            $(IntermediateOutputDirectoryEC)\mutex.obj;
-            $(IntermediateOutputDirectoryEC)\pplerror.obj;
-            $(IntermediateOutputDirectoryEC)\ppltasks.obj;
-            $(IntermediateOutputDirectoryEC)\taskscheduler.obj;
-            $(IntermediateOutputDirectoryEC)\thread0.obj;
-            $(IntermediateOutputDirectoryEC)\uncaught_exception.obj;
-            $(IntermediateOutputDirectoryEC)\uncaught_exceptions.obj;
-            $(IntermediateOutputDirectoryEC)\ushcerr.obj;
-            $(IntermediateOutputDirectoryEC)\ushcin.obj;
-            $(IntermediateOutputDirectoryEC)\ushclog.obj;
-            $(IntermediateOutputDirectoryEC)\ushcout.obj;
-            $(IntermediateOutputDirectoryEC)\ushiostr.obj;
-            $(IntermediateOutputDirectoryEC)\wcerr.obj;
-            $(IntermediateOutputDirectoryEC)\wcin.obj;
-            $(IntermediateOutputDirectoryEC)\wclog.obj;
-            $(IntermediateOutputDirectoryEC)\wcout.obj;
-            $(IntermediateOutputDirectoryEC)\wiostrea.obj;
-            $(IntermediateOutputDirectoryEC)\wlocale.obj;
-            $(IntermediateOutputDirectoryEC)\xalloc.obj;
-            $(IntermediateOutputDirectoryEC)\xdateord.obj;
-            $(IntermediateOutputDirectoryEC)\xlgamma.obj;
-            $(IntermediateOutputDirectoryEC)\xlocale.obj;
-            $(IntermediateOutputDirectoryEC)\xlock.obj;
-            $(IntermediateOutputDirectoryEC)\xonce.obj;
-            $(IntermediateOutputDirectoryEC)\xrngabort.obj;
-            $(IntermediateOutputDirectoryEC)\xrngdev.obj;
-            $(IntermediateOutputDirectoryEC)\xthrow.obj;
-            $(IntermediateOutputDirectoryEC)\winapisupp.obj;
-            $(IntermediateOutputDirectoryEC)\dllmain.obj;
-            $(IntermediateOutputDirectoryEC)\instances.obj;
-       </ECImportLibObjs>
-        <!-- OBJs that need to get added to msvcprt[d].lib and msvcprt_base[d].lib. -->
-        <!-- They get added to both through msvcprt_base.exp -->
-        <ECLibObjs>
-            $(IntermediateOutputDirectoryEC)\filesystem.obj;
-            $(IntermediateOutputDirectoryEC)\locale0_implib.obj;
-            $(IntermediateOutputDirectoryEC)\nothrow.obj;
-            $(IntermediateOutputDirectoryEC)\parallel_algorithms.obj;
-            $(IntermediateOutputDirectoryEC)\sharedmutex.obj;
-            $(IntermediateOutputDirectoryEC)\vector_algorithms.obj;
-        </ECLibObjs>
-    </PropertyGroup>
-
-    <!-- OBJs for msvcprt_base.lib -->
-    <ItemGroup Condition="'$(Arm64X)' == 'true'">
-        <!-- Add EC symbols to import lib -->
-        <ImportLib Include="$(ECImportLibObjs)" />
-        <!-- Add these EC OBJs to import lib -->
-        <ImportLib Include="$(ECLibObjs)">
-            <IncludeInLink>false</IncludeInLink>
-            <IncludeInImportLib>true</IncludeInImportLib>
-        </ImportLib>
-    </ItemGroup>
-
-
-    <ItemGroup Condition="'$(Arm64X)' == 'true' and '$(TargetNetFx)' != true" >
-        <Link Include="$(IntermediateOutputDirectoryEC)\_tolower.obj;
-                $(IntermediateOutputDirectoryEC)\_toupper.obj;
-                $(IntermediateOutputDirectoryEC)\atomic.obj;
-                $(IntermediateOutputDirectoryEC)\cthread.obj;
-                $(IntermediateOutputDirectoryEC)\xnotify.obj;
-                $(IntermediateOutputDirectoryEC)\xtime.obj;
-                $(IntermediateOutputDirectoryEC)\xcosh.obj;
-                $(IntermediateOutputDirectoryEC)\xdint.obj;
-                $(IntermediateOutputDirectoryEC)\xdnorm.obj;
-                $(IntermediateOutputDirectoryEC)\xdscale.obj;
-                $(IntermediateOutputDirectoryEC)\xdtento.obj;
-                $(IntermediateOutputDirectoryEC)\xdtest.obj;
-                $(IntermediateOutputDirectoryEC)\xdunscal.obj;
-                $(IntermediateOutputDirectoryEC)\xexp.obj;
-                $(IntermediateOutputDirectoryEC)\xfcosh.obj;
-                $(IntermediateOutputDirectoryEC)\xfdint.obj;
-                $(IntermediateOutputDirectoryEC)\xfdnorm.obj;
-                $(IntermediateOutputDirectoryEC)\xfdscale.obj;
-                $(IntermediateOutputDirectoryEC)\xfdtento.obj;
-                $(IntermediateOutputDirectoryEC)\xfdtest.obj;
-                $(IntermediateOutputDirectoryEC)\xfdunsca.obj;
-                $(IntermediateOutputDirectoryEC)\xferaise.obj;
-                $(IntermediateOutputDirectoryEC)\xfexp.obj;
-                $(IntermediateOutputDirectoryEC)\xfprec.obj;
-                $(IntermediateOutputDirectoryEC)\xfsinh.obj;
-                $(IntermediateOutputDirectoryEC)\xfvalues.obj;
-                $(IntermediateOutputDirectoryEC)\xgetwctype.obj;
-                $(IntermediateOutputDirectoryEC)\xlcosh.obj;
-                $(IntermediateOutputDirectoryEC)\xldint.obj;
-                $(IntermediateOutputDirectoryEC)\xldscale.obj;
-                $(IntermediateOutputDirectoryEC)\xldtento.obj;
-                $(IntermediateOutputDirectoryEC)\xldtest.obj;
-                $(IntermediateOutputDirectoryEC)\xldunsca.obj;
-                $(IntermediateOutputDirectoryEC)\xlexp.obj;
-                $(IntermediateOutputDirectoryEC)\xlpoly.obj;
-                $(IntermediateOutputDirectoryEC)\xlprec.obj;
-                $(IntermediateOutputDirectoryEC)\xlsinh.obj;
-                $(IntermediateOutputDirectoryEC)\xlvalues.obj;
-                $(IntermediateOutputDirectoryEC)\xmbtowc.obj;
-                $(IntermediateOutputDirectoryEC)\xmtx.obj;
-                $(IntermediateOutputDirectoryEC)\xpoly.obj;
-                $(IntermediateOutputDirectoryEC)\xprec.obj;
-                $(IntermediateOutputDirectoryEC)\xsinh.obj;
-                $(IntermediateOutputDirectoryEC)\xstod.obj;
-                $(IntermediateOutputDirectoryEC)\xstof.obj;
-                $(IntermediateOutputDirectoryEC)\xstoflt.obj;
-                $(IntermediateOutputDirectoryEC)\xstol.obj;
-                $(IntermediateOutputDirectoryEC)\xstold.obj;
-                $(IntermediateOutputDirectoryEC)\xstoll.obj;
-                $(IntermediateOutputDirectoryEC)\xstopfx.obj;
-                $(IntermediateOutputDirectoryEC)\xstoul.obj;
-                $(IntermediateOutputDirectoryEC)\xstoull.obj;
-                $(IntermediateOutputDirectoryEC)\xstoxflt.obj;
-                $(IntermediateOutputDirectoryEC)\xstrcoll.obj;
-                $(IntermediateOutputDirectoryEC)\xstrxfrm.obj;
-                $(IntermediateOutputDirectoryEC)\xtowlower.obj;
-                $(IntermediateOutputDirectoryEC)\xtowupper.obj;
-                $(IntermediateOutputDirectoryEC)\xvalues.obj;
-                $(IntermediateOutputDirectoryEC)\xwcscoll.obj;
-                $(IntermediateOutputDirectoryEC)\xwcsxfrm.obj;
-                $(IntermediateOutputDirectoryEC)\xwctomb.obj;
-                $(IntermediateOutputDirectoryEC)\xwstod.obj;
-                $(IntermediateOutputDirectoryEC)\xwstof.obj;
-                $(IntermediateOutputDirectoryEC)\xwstoflt.obj;
-                $(IntermediateOutputDirectoryEC)\xwstold.obj;
-                $(IntermediateOutputDirectoryEC)\xwstopfx.obj;
-                $(IntermediateOutputDirectoryEC)\xwstoxfl.obj;
-                $(IntermediateOutputDirectoryEC)\excptptr.obj;
-                $(IntermediateOutputDirectoryEC)\StlCompareStringA.obj;
-                $(IntermediateOutputDirectoryEC)\StlCompareStringW.obj;
-                $(IntermediateOutputDirectoryEC)\StlLCMapStringA.obj;
-                $(IntermediateOutputDirectoryEC)\StlLCMapStringW.obj;
-                $(IntermediateOutputDirectoryEC)\winapinls.obj;
-                $(IntermediateOutputDirectoryEC)\cerr.obj;
-                $(IntermediateOutputDirectoryEC)\cin.obj;
-                $(IntermediateOutputDirectoryEC)\clog.obj;
-                $(IntermediateOutputDirectoryEC)\cout.obj;
-                $(IntermediateOutputDirectoryEC)\filesys.obj;
-                $(IntermediateOutputDirectoryEC)\fiopen.obj;
-                $(IntermediateOutputDirectoryEC)\future.obj;
-                $(IntermediateOutputDirectoryEC)\iomanip.obj;
-                $(IntermediateOutputDirectoryEC)\ios.obj;
-                $(IntermediateOutputDirectoryEC)\iosptrs.obj;
-                $(IntermediateOutputDirectoryEC)\iostream.obj;
-                $(IntermediateOutputDirectoryEC)\locale.obj;
-                $(IntermediateOutputDirectoryEC)\locale0.obj;
-                $(IntermediateOutputDirectoryEC)\multprec.obj;
-                $(IntermediateOutputDirectoryEC)\raisehan.obj;
-                $(IntermediateOutputDirectoryEC)\stdhndlr.obj;
-                $(IntermediateOutputDirectoryEC)\stdthrow.obj;
-                $(IntermediateOutputDirectoryEC)\syserror.obj;
-                $(IntermediateOutputDirectoryEC)\cond.obj;
-                $(IntermediateOutputDirectoryEC)\mutex.obj;
-                $(IntermediateOutputDirectoryEC)\pplerror.obj;
-                $(IntermediateOutputDirectoryEC)\ppltasks.obj;
-                $(IntermediateOutputDirectoryEC)\taskscheduler.obj;
-                $(IntermediateOutputDirectoryEC)\thread0.obj;
-                $(IntermediateOutputDirectoryEC)\uncaught_exception.obj;
-                $(IntermediateOutputDirectoryEC)\uncaught_exceptions.obj;
-                $(IntermediateOutputDirectoryEC)\ushcerr.obj;
-                $(IntermediateOutputDirectoryEC)\ushcin.obj;
-                $(IntermediateOutputDirectoryEC)\ushclog.obj;
-                $(IntermediateOutputDirectoryEC)\ushcout.obj;
-                $(IntermediateOutputDirectoryEC)\ushiostr.obj;
-                $(IntermediateOutputDirectoryEC)\wcerr.obj;
-                $(IntermediateOutputDirectoryEC)\wcin.obj;
-                $(IntermediateOutputDirectoryEC)\wclog.obj;
-                $(IntermediateOutputDirectoryEC)\wcout.obj;
-                $(IntermediateOutputDirectoryEC)\wiostrea.obj;
-                $(IntermediateOutputDirectoryEC)\wlocale.obj;
-                $(IntermediateOutputDirectoryEC)\xalloc.obj;
-                $(IntermediateOutputDirectoryEC)\xdateord.obj;
-                $(IntermediateOutputDirectoryEC)\xlgamma.obj;
-                $(IntermediateOutputDirectoryEC)\xlocale.obj;
-                $(IntermediateOutputDirectoryEC)\xlock.obj;
-                $(IntermediateOutputDirectoryEC)\xonce.obj;
-                $(IntermediateOutputDirectoryEC)\xrngabort.obj;
-                $(IntermediateOutputDirectoryEC)\xrngdev.obj;
-                $(IntermediateOutputDirectoryEC)\xthrow.obj;
-                $(IntermediateOutputDirectoryEC)\winapisupp.obj;"/>
-        <Link Condition="'$(CrtBuildModelIsDll)' == 'true'"
-        Include="$(IntermediateOutputDirectoryEC)\dllmain.obj;
-                $(IntermediateOutputDirectoryEC)\instances.obj;"/>
-        <Link Condition="'$(CrtBuildModelIsDll)' != 'true'"
-        Include="$(IntermediateOutputDirectoryEC)\filesystem.obj;
-                $(IntermediateOutputDirectoryEC)\locale0_implib.obj;
-                $(IntermediateOutputDirectoryEC)\memory_resource.obj;
-                $(IntermediateOutputDirectoryEC)\nothrow.obj;
-                $(IntermediateOutputDirectoryEC)\parallel_algorithms.obj;
-                $(IntermediateOutputDirectoryEC)\sharedmutex.obj;
-                $(IntermediateOutputDirectoryEC)\special_math.obj;
-                $(IntermediateOutputDirectoryEC)\ulocale.obj;
-                $(IntermediateOutputDirectoryEC)\vector_algorithms.obj;"/>
-    </ItemGroup>
-
     <Import Project="$(VCToolsRootPath)\crt\crt_build.targets"/>
     <Target Name="GetBaseAddress"/>
 
diff --git a/stl/msbuild/stl_codecvt_ids/msvcp_codecvt_ids.settings.targets b/stl/msbuild/stl_codecvt_ids/msvcp_codecvt_ids.settings.targets
index 3df5ef40e29..2116ad9a688 100644
--- a/stl/msbuild/stl_codecvt_ids/msvcp_codecvt_ids.settings.targets
+++ b/stl/msbuild/stl_codecvt_ids/msvcp_codecvt_ids.settings.targets
@@ -50,11 +50,6 @@ SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
         <LinkRelease>true</LinkRelease>
     </PropertyGroup>
 
-    <PropertyGroup Condition="'$(Arm64X)' == 'true' and '$(TargetNetFx)' != 'true'">
-        <DllDef>$(IntermediateOutputDirectoryEC)\$(DllDefName).def</DllDef>
-        <DllDefArm64Native>$(IntermediateOutputDirectory)\$(DllDefName).def</DllDefArm64Native>
-    </PropertyGroup>
-
     <ItemGroup>
         <CppPreprocess Include="$(MSBuildThisFileDirectory)\msvcprt_codecvt_ids.src">
             <Defines>LIBRARYNAME=$(OutputName.ToUpper());$(DllCppDefines)</Defines>
@@ -75,11 +70,6 @@ SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
         <TargetLib Include="$(UniversalCRTLib)"/>
     </ItemGroup>
 
-    <ItemGroup Condition="'$(Arm64X)' == 'true' and '$(TargetNetFx)' != 'true'">
-        <ImportLib Include="$(IntermediateOutputDirectoryEC)\ulocale.obj" />
-        <Link Include="$(IntermediateOutputDirectoryEC)\ulocale.obj" />
-    </ItemGroup>
-
     <!-- Copy the output dll and pdb to various destinations -->
     <ItemGroup>
         <CopyFilesForCrossTools Condition="'$(MsvcpFlavor)' == 'kernel32'" Include="
diff --git a/stl/msbuild/stl_post/msvcp_post.settings.targets b/stl/msbuild/stl_post/msvcp_post.settings.targets
index 3271bca0e9f..dd42bd6a6f3 100644
--- a/stl/msbuild/stl_post/msvcp_post.settings.targets
+++ b/stl/msbuild/stl_post/msvcp_post.settings.targets
@@ -52,11 +52,21 @@ SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
             Include="$(CrtRoot)\github\stl\msbuild\stl_codecvt_ids\$(CrtBuildModel)\msvcp_codecvt_ids_$(MsvcpFlavor)\msvcp_codecvt_ids.nativeproj"/>
         <ProjectReference Condition="'$(CanSkipProjectReferenceForTargetLib)' != 'true'"
             Include="$(CrtRoot)\github\stl\msbuild\stl_atomic_wait\$(CrtBuildModel)\msvcp_atomic_wait_$(MsvcpFlavor)\msvcp_atomic_wait.nativeproj"/>
-        <Lib Include="$(CrtLibPath)\msvcprt_base$(BuildSuffix)$(ClrLibSuffix).lib"/>
-        <Lib Include="$(CrtLibPath)\msvcprt_1$(BuildSuffix)$(ClrLibSuffix).lib"/>
-        <Lib Include="$(CrtLibPath)\msvcprt_2$(BuildSuffix)$(ClrLibSuffix).lib"/>
-        <Lib Include="$(CrtLibPath)\msvcprt$(BuildSuffix)_codecvt_ids$(ClrLibSuffix).lib"/>
-        <Lib Include="$(CrtLibPath)\msvcprt$(BuildSuffix)_atomic_wait$(ClrLibSuffix).lib"/>
+        <Lib Include="$(CrtLibPath)\msvcprt_base$(BuildSuffix)$(ClrLibSuffix).lib">
+            <IncludeInChameleonLib>false</IncludeInChameleonLib>
+        </Lib>
+        <Lib Include="$(CrtLibPath)\msvcprt_1$(BuildSuffix)$(ClrLibSuffix).lib">
+            <IncludeInChameleonLib>false</IncludeInChameleonLib>
+        </Lib>
+        <Lib Include="$(CrtLibPath)\msvcprt_2$(BuildSuffix)$(ClrLibSuffix).lib">
+            <IncludeInChameleonLib>false</IncludeInChameleonLib>
+        </Lib>
+        <Lib Include="$(CrtLibPath)\msvcprt$(BuildSuffix)_codecvt_ids$(ClrLibSuffix).lib">
+            <IncludeInChameleonLib>false</IncludeInChameleonLib>
+        </Lib>
+        <Lib Include="$(CrtLibPath)\msvcprt$(BuildSuffix)_atomic_wait$(ClrLibSuffix).lib">
+            <IncludeInChameleonLib>false</IncludeInChameleonLib>
+        </Lib>
         <Lib Include="$(MSBuildThisFileDirectory)\..\..\aliases\$(BuildArchitecture)\std_init_once_begin_initialize.obj" />
         <Lib Include="$(MSBuildThisFileDirectory)\..\..\aliases\$(BuildArchitecture)\std_init_once_complete.obj" />
     </ItemGroup>