diff --git a/.github/workflows/build-toolchain.yml b/.github/workflows/build-toolchain.yml
index 83f9facee..7d82b805f 100644
--- a/.github/workflows/build-toolchain.yml
+++ b/.github/workflows/build-toolchain.yml
@@ -54,10 +54,10 @@ on:
         default: false
         type: boolean
 
-      stable_point:
-        description: 'Use Repo Smart Sync'
+      use_host_toolchain:
+        description: 'Use host toolchain (MSVC) instead of clang-cl/lld-link'
         type: boolean
-        default: false
+        default: true
         required: false
 
   workflow_call:
@@ -628,6 +628,7 @@ jobs:
       compilers_build_runner: ${{ needs.context.outputs[format('windows_{0}_compilers_runner', needs.context.outputs.windows_build_cpu)] }}
       build_android: ${{ inputs.build_android }}
       python_version: ${{ needs.context.outputs.python_version }}
+      use_host_toolchain: ${{ inputs.use_host_toolchain }}
     secrets:
       SYMBOL_SERVER_PAT: ${{ secrets.SYMBOL_SERVER_PAT }}
       CERTIFICATE: ${{ secrets.CERTIFICATE }}
diff --git a/.github/workflows/swift-toolchain.yml b/.github/workflows/swift-toolchain.yml
index f4d777dab..c2a15a928 100644
--- a/.github/workflows/swift-toolchain.yml
+++ b/.github/workflows/swift-toolchain.yml
@@ -248,6 +248,11 @@ on:
         required: true
         type: string
 
+      use_host_toolchain:
+        required: false
+        type: boolean
+        default: true
+
     secrets:
       SYMBOL_SERVER_PAT:
         required: true
@@ -350,10 +355,12 @@ jobs:
           install-dir: ${{ github.workspace }}/BuildRoot/Library/sqlite-${{ inputs.swift_toolchain_sqlite_version }}/usr
           android-api-level: ${{ inputs.ANDROID_API_LEVEL }}
           android-clang-version: ${{ inputs.ANDROID_CLANG_VERSION }}
-          msvc-compilers: '@("C")'
+          msvc-compilers: ${{ inputs.use_host_toolchain && '@("C")' || '@()' }}
+          pinned-compilers: ${{ inputs.use_host_toolchain && '@()' || '@("C")' }}
           cmake-defines: |
             @{
               'BUILD_SHARED_LIBS' = "NO";
+              'CMAKE_C_FLAGS' = "${{ inputs.use_host_toolchain && '' || '-fuse-ld=lld' }}";
             }
       - name: Build SQLite
         run: cmake --build ${{ github.workspace }}/BinaryCache/sqlite-${{ inputs.swift_toolchain_sqlite_version }}
@@ -434,8 +441,14 @@ jobs:
           arch: ${{ inputs.build_arch }}
           src-dir: ${{ github.workspace }}/SourceCache/ds2/Tools/RegsGen2
           bin-dir: ${{ github.workspace }}/BinaryCache/RegsGen2
-          msvc-compilers: '@("C", "CXX")'
+          msvc-compilers: ${{ inputs.use_host_toolchain && '@("C", "CXX")' || '@()' }}
+          pinned-compilers: ${{ inputs.use_host_toolchain && '@()' || '@("C", "CXX")' }}
           cache-script: ${{ github.workspace }}/SourceCache/ds2/cmake/caches/MSVCWarnings.cmake
+          cmake-defines: |
+            @{
+              'CMAKE_C_FLAGS' = "${{ inputs.use_host_toolchain && '' || '-fuse-ld=lld' }}";
+              'CMAKE_CXX_FLAGS' = "${{ inputs.use_host_toolchain && '' || '-fuse-ld=lld' }}";
+            }
       - name: Build RegsGen2
         if: inputs.build_android
         run: cmake --build ${{ github.workspace }}/BinaryCache/RegsGen2 --config Release
@@ -632,12 +645,15 @@ jobs:
           src-dir: ${{ github.workspace }}/SourceCache/cmark-gfm
           bin-dir: ${{ github.workspace }}/BinaryCache/cmark-gfm-${{ inputs.swift_cmark_version }}
           install-dir: ${{ github.workspace }}/BuildRoot/Library/cmark-gfm-${{ inputs.swift_cmark_version }}/usr
-          msvc-compilers: '@("C", "CXX")'
+          msvc-compilers: ${{ inputs.use_host_toolchain && '@("C", "CXX")' || '@()' }}
+          pinned-compilers: ${{ inputs.use_host_toolchain && '@()' || '@("C", "CXX")' }}
           cmake-defines: |
             @{
               'BUILD_SHARED_LIBS' = "YES";
               'BUILD_TESTING' = "NO";
               'CMAKE_INSTALL_SYSTEM_RUNTIME_LIBS_SKIP' = "YES";
+              'CMAKE_C_FLAGS' = "${{ inputs.use_host_toolchain && '' || '-fuse-ld=lld' }}";
+              'CMAKE_CXX_FLAGS' = "${{ inputs.use_host_toolchain && '' || '-fuse-ld=lld' }}";
             }
       - name: Build cmark-gfm
         run: cmake --build ${{ github.workspace }}/BinaryCache/cmark-gfm-${{ inputs.swift_cmark_version }}
@@ -725,7 +741,8 @@ jobs:
           arch: ${{ matrix.arch }}
           src-dir: ${{ github.workspace }}/SourceCache/llvm-project/llvm
           bin-dir: ${{ github.workspace }}/BinaryCache/0
-          msvc-compilers: '@("ASM_MASM", "C", "CXX")'
+          msvc-compilers: ${{ inputs.use_host_toolchain && '@("ASM_MASM", "C", "CXX")' || '@()' }}
+          pinned-compilers: ${{ inputs.use_host_toolchain && '@()' || '@("ASM_MASM", "C", "CXX")' }}
           cmake-defines: |
             @{
               'CMAKE_CROSSCOMPILING' = "NO";
@@ -755,6 +772,8 @@ jobs:
               'SWIFT_INCLUDE_DOCS' = "NO";
               'SWIFT_INCLUDE_TESTS' = "NO";
               'cmark-gfm_DIR' = "${{ github.workspace }}/BuildRoot/Library/cmark-gfm-${{ inputs.swift_cmark_version }}/usr/lib/cmake";
+              'CMAKE_C_FLAGS' = "${{ inputs.use_host_toolchain && '' || '-fuse-ld=lld' }}";
+              'CMAKE_CXX_FLAGS' = "${{ inputs.use_host_toolchain && '' || '-fuse-ld=lld' }}";
             }
       - name: Build llvm-tblgen
         run: cmake --build ${{ github.workspace }}/BinaryCache/0 --target llvm-tblgen
@@ -1087,8 +1106,8 @@ jobs:
           bin-dir: ${{ github.workspace }}/BinaryCache/1
           install-dir: ${{ github.workspace }}/BuildRoot/Library/Developer/Toolchains/${{ inputs.swift_version }}+${{ matrix.variant }}/usr
           swift-sdk-path: ${{ steps.setup-context.outputs.sdkroot }}
-          msvc-compilers: '@("C", "CXX")'
-          pinned-compilers: '@("Swift")'
+          msvc-compilers: ${{ inputs.use_host_toolchain && '@("C", "CXX")' || '@()' }}
+          pinned-compilers: ${{ inputs.use_host_toolchain && '@("Swift")' || '@("C", "CXX", "Swift")' }}
           cache-script: ${{ github.workspace }}/SourceCache/swift/cmake/caches/${{ matrix.os }}-${{ matrix.cpu }}.cmake
           cmake-defines: |
             @{
@@ -1106,6 +1125,7 @@ jobs:
               'LLDB_TABLEGEN' = "${{ github.workspace }}/BinaryCache/0/bin/lldb-tblgen${ExeSuffix}";
               'LLVM_CONFIG_PATH' = "${{ github.workspace }}/BinaryCache/0/bin/llvm-config${ExeSuffix}";
               'LLVM_ENABLE_ASSERTIONS' = ${{ matrix.variant == 'Asserts' && '"YES"' || '"NO"' }};
+              'LLVM_ENABLE_LLD' = "${{ inputs.use_host_toolchain && 'NO' || 'YES' }}";
               'LLVM_EXTERNAL_SWIFT_SOURCE_DIR' = "${{ github.workspace }}/SourceCache/swift";
               'LLVM_HOST_TRIPLE' = "${{ matrix.triple }}";
               'LLVM_NATIVE_TOOL_DIR' = "${{ github.workspace }}/BinaryCache/0/bin";
@@ -1140,6 +1160,9 @@ jobs:
               'LLVM_VERSION_SUFFIX' = "";
               'LLVM_PARALLEL_LINK_JOBS' = "${{ steps.setup-context.outputs.link-jobs }}";
               'SWIFT_PARALLEL_LINK_JOBS' = "${{ steps.setup-context.outputs.link-jobs }}";
+              'CMAKE_C_FLAGS' = "${{ inputs.use_host_toolchain && '' || '-fuse-ld=lld' }}";
+              'CMAKE_CXX_FLAGS' = "${{ inputs.use_host_toolchain && '' || '-fuse-ld=lld' }}";
+              'CMAKE_Swift_FLAGS' = "${{ inputs.use_host_toolchain && '' || '-use-ld=lld' }}";
             }
 
       - name: Build Compiler Distribution
@@ -1308,11 +1331,13 @@ jobs:
           android-api-level: ${{ inputs.ANDROID_API_LEVEL }}
           android-clang-version: ${{ inputs.ANDROID_CLANG_VERSION }}
           ndk-path: ${{ steps.setup-ndk.outputs.ndk-path }}
-          msvc-compilers: '@("C")'
+          msvc-compilers: ${{ inputs.use_host_toolchain && '@("C")' || '@()' }}
+          pinned-compilers: ${{ inputs.use_host_toolchain && '@()' || '@("C")' }}
           cmake-defines: |
             @{
               'BUILD_SHARED_LIBS' = "NO";
               'CMAKE_POSITION_INDEPENDENT_CODE' = "YES";
+              'CMAKE_C_FLAGS' = "${{ inputs.use_host_toolchain && '' || '-fuse-ld=lld' }}";
             }
       - name: Build zlib
         run: cmake --build ${{ github.workspace }}/BinaryCache/zlib-${{ inputs.zlib_version }}
@@ -1396,11 +1421,13 @@ jobs:
           android-api-level: ${{ inputs.ANDROID_API_LEVEL }}
           android-clang-version: ${{ inputs.ANDROID_CLANG_VERSION }}
           ndk-path: ${{ steps.setup-ndk.outputs.ndk-path }}
-          msvc-compilers: '@("C")'
+          msvc-compilers: ${{ inputs.use_host_toolchain && '@("C")' || '@()' }}
+          pinned-compilers: ${{ inputs.use_host_toolchain && '@()' || '@("C")' }}
           cmake-defines: |
             @{
               'BUILD_SHARED_LIBS' = "NO";
               'CMAKE_POSITION_INDEPENDENT_CODE' = "YES";
+              'CMAKE_C_FLAGS' = "${{ inputs.use_host_toolchain && '' || '-fuse-ld=lld' }}";
             }
       - name: Build brotli
         run: cmake --build ${{ github.workspace }}/BinaryCache/brotli-${{ inputs.brotli_version }}
@@ -1490,7 +1517,8 @@ jobs:
           android-api-level: ${{ inputs.ANDROID_API_LEVEL }}
           android-clang-version: ${{ inputs.ANDROID_CLANG_VERSION }}
           ndk-path: ${{ steps.setup-ndk.outputs.ndk-path }}
-          msvc-compilers: '@("C")'
+          msvc-compilers: ${{ inputs.use_host_toolchain && '@("C")' || '@()' }}
+          pinned-compilers: ${{ inputs.use_host_toolchain && '@()' || '@("C")' }}
           cmake-defines: |
             @{
               'BUILD_SHARED_LIBS' = "NO";
@@ -1580,6 +1608,7 @@ jobs:
               'USE_WIN32_LDAP' = "NO";
               'ZLIB_ROOT' = "${{ github.workspace }}/BuildRoot/Library/zlib-${{ inputs.zlib_version }}/usr";
               'ZLIB_LIBRARY' = "${{ github.workspace }}/BuildRoot/Library/zlib-${{ inputs.zlib_version }}/usr/lib/zlibstatic.lib";
+              'CMAKE_C_FLAGS' = "${{ inputs.use_host_toolchain && '' || '-fuse-ld=lld' }}";
             }
       - name: Build curl
         run: cmake --build ${{ github.workspace }}/BinaryCache/curl-${{ inputs.curl_version }}
@@ -1663,7 +1692,8 @@ jobs:
           android-api-level: ${{ inputs.ANDROID_API_LEVEL }}
           android-clang-version: ${{ inputs.ANDROID_CLANG_VERSION }}
           ndk-path: ${{ steps.setup-ndk.outputs.ndk-path }}
-          msvc-compilers: '@("C", "CXX")'
+          msvc-compilers: ${{ inputs.use_host_toolchain && '@("C", "CXX")' || '@()' }}
+          pinned-compilers: ${{ inputs.use_host_toolchain && '@()' || '@("C", "CXX")' }}
           cmake-defines: |
             @{
               'BUILD_SHARED_LIBS' = "NO";
@@ -1675,6 +1705,8 @@ jobs:
               'LIBXML2_WITH_TESTS' = "NO";
               'LIBXML2_WITH_THREADS' = "YES";
               'LIBXML2_WITH_ZLIB' = "NO";
+              'CMAKE_C_FLAGS' = "${{ inputs.use_host_toolchain && '' || '-fuse-ld=lld' }}";
+              'CMAKE_CXX_FLAGS' = "${{ inputs.use_host_toolchain && '' || '-fuse-ld=lld' }}";
             }
       - name: Build libxml2
         run: cmake --build ${{ github.workspace }}/BinaryCache/libxml2-${{ inputs.libxml2_version }}
@@ -1795,11 +1827,14 @@ jobs:
           android-api-level: ${{ inputs.ANDROID_API_LEVEL }}
           android-clang-version: ${{ inputs.ANDROID_CLANG_VERSION }}
           ndk-path: ${{ steps.setup-ndk.outputs.ndk-path }}
-          msvc-compilers: '@("ASM_MASM", "C", "CXX")'
+          msvc-compilers: ${{ inputs.use_host_toolchain && '@("ASM_MASM", "C", "CXX")' || '@()' }}
+          pinned-compilers: ${{ inputs.use_host_toolchain && '@()' || '@("ASM_MASM", "C", "CXX")' }}
           cmake-defines: |
             @{
               'LLVM_ENABLE_ASSERTIONS' = "YES";
               'LLVM_HOST_TRIPLE' = "${{ matrix.triple }}";
+              'CMAKE_C_FLAGS' = "${{ inputs.use_host_toolchain && '' || '-fuse-ld=lld' }}";
+              'CMAKE_CXX_FLAGS' = "${{ inputs.use_host_toolchain && '' || '-fuse-ld=lld' }}";
              }
 
       - name: Configure Swift Standard Library
@@ -3706,7 +3741,8 @@ jobs:
           bin-dir: ${{ github.workspace }}/BinaryCache/swift-format
           install-dir: ${{ github.workspace }}/BuildRoot/Library/Developer/Toolchains/${{ inputs.swift_version }}+Asserts/usr
           swift-sdk-path: ${{ github.workspace }}/BinaryCache/Library/Developer/Platforms/${{ matrix.os }}.platform/Developer/SDKs/${{ matrix.os }}.sdk
-          msvc-compilers: '@("C")'
+          msvc-compilers: ${{ inputs.use_host_toolchain && '@("C")' || '@()' }}
+          pinned-compilers: ${{ inputs.use_host_toolchain && '@()' || '@("C")' }}
           built-compilers: '@("Swift")'
           cmake-defines: |
             @{
@@ -3715,6 +3751,7 @@ jobs:
               'SwiftMarkdown_DIR' = "${{ github.workspace }}/BinaryCache/swift-markdown/cmake/modules";
               'SwiftSyntax_DIR' = "${{ github.workspace }}/BinaryCache/swift-syntax/cmake/modules";
               'cmark-gfm_DIR' = "${{ github.workspace }}/BinaryCache/Library/cmark-gfm-${{ inputs.swift_cmark_version }}/usr/lib/cmake";
+              'CMAKE_C_FLAGS' = "${{ inputs.use_host_toolchain && '' || '-fuse-ld=lld' }}";
             }
       - name: Build swift-format
         run: cmake --build ${{ github.workspace }}/BinaryCache/swift-format
@@ -3733,7 +3770,12 @@ jobs:
           src-dir: ${{ github.workspace }}/SourceCache/swift-lmdb
           bin-dir: ${{ github.workspace }}/BinaryCache/swift-lmdb
           swift-sdk-path: ${{ github.workspace }}/BinaryCache/Library/Developer/Platforms/${{ matrix.os }}.platform/Developer/SDKs/${{ matrix.os }}.sdk
-          msvc-compilers: '@("C")'
+          msvc-compilers: ${{ inputs.use_host_toolchain && '@("C")' || '@()' }}
+          pinned-compilers: ${{ inputs.use_host_toolchain && '@()' || '@("C")' }}
+          cmake-defines: |
+            @{
+              'CMAKE_C_FLAGS' = "${{ inputs.use_host_toolchain && '' || '-fuse-ld=lld' }}";
+            }
       - name: Build swift-lmdb
         run: cmake --build ${{ github.workspace }}/BinaryCache/swift-lmdb