diff --git a/.github/workflows/schedule-swift-toolchain.yml b/.github/workflows/schedule-swift-toolchain.yml
index 977e27c3..b196f327 100644
--- a/.github/workflows/schedule-swift-toolchain.yml
+++ b/.github/workflows/schedule-swift-toolchain.yml
@@ -10,6 +10,7 @@ on:
 
 jobs:
   call_development_snapshot:
+    if: false
     name: Development Snapshot
     uses: ./.github/workflows/build-toolchain.yml
     with:
@@ -26,7 +27,7 @@ jobs:
       id-token: write
 
   call_development_snapshot_win_arm64:
-    if: false
+    if: true
     name: Development Snapshot on Windows/ARM64
     uses: ./.github/workflows/build-toolchain.yml
     with:
diff --git a/.github/workflows/swift-toolchain.yml b/.github/workflows/swift-toolchain.yml
index 1d8bfb06..f4431bb7 100644
--- a/.github/workflows/swift-toolchain.yml
+++ b/.github/workflows/swift-toolchain.yml
@@ -401,7 +401,7 @@ jobs:
 
   ds2:
     # TODO: Build this on macOS or make an equivalent Mac-only job
-    if: inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+    if: inputs.build_os == 'Windows' && inputs.build_arch == 'amd64'
     needs: [ds2_tools]
     runs-on: ${{ inputs.default_build_runner }}
 
@@ -938,7 +938,7 @@ jobs:
           release-tag-name: ${{ env.WORKAROUND_WINDOWS_ARM64_PINNED_BOOTSTRAP_TOOLCHAIN_RELEASE }}
 
       - uses: nttld/setup-ndk@v1
-        if: inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         id: setup-ndk
         with:
           ndk-version: ${{ inputs.ANDROID_NDK_VERSION }}
@@ -1155,14 +1155,14 @@ jobs:
           variant: sccache
 
       - uses: nttld/setup-ndk@v1
-        if: inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         id: setup-ndk
         with:
           ndk-version: ${{ inputs.ANDROID_NDK_VERSION }}
 
       - name: Configure zlib
         run: |
-          if ( "${{ inputs.build_os }}" -ne "Windows" -or "${{ inputs.build_arch }}" -ne "arm64" ) {
+          if (-not ("${{ inputs.build_os }}" -eq "Windows" -and "${{ inputs.build_arch }}" -eq "arm64" )) {
             $NDKPATH = "${{ steps.setup-ndk.outputs.ndk-path }}"
             if ( "${{ inputs.build_os }}" -eq "Windows" ) {
               $NDKPATH = cygpath -m $NDKPATH
@@ -1247,14 +1247,14 @@ jobs:
           variant: sccache
 
       - uses: nttld/setup-ndk@v1
-        if: inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         id: setup-ndk
         with:
           ndk-version: ${{ inputs.ANDROID_NDK_VERSION }}
 
       - name: Configure curl
         run: |
-          if ( "${{ inputs.build_os }}" -ne "Windows" -or "${{ inputs.build_arch }}" -ne "arm64" ) {
+          if (-not ("${{ inputs.build_os }}" -eq "Windows" -and "${{ inputs.build_arch }}" -eq "arm64" )) {
             $NDKPATH = "${{ steps.setup-ndk.outputs.ndk-path }}"
             if ( "${{ inputs.build_os }}" -eq "Windows" ) {
               $NDKPATH = cygpath -m $NDKPATH
@@ -1411,14 +1411,14 @@ jobs:
           variant: sccache
 
       - uses: nttld/setup-ndk@v1
-        if: inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         id: setup-ndk
         with:
           ndk-version: ${{ inputs.ANDROID_NDK_VERSION }}
 
       - name: Configure libxml2
         run: |
-          if ( "${{ inputs.build_os }}" -ne "Windows" -or "${{ inputs.build_arch }}" -ne "arm64" ) {
+          if (-not ("${{ inputs.build_os }}" -eq "Windows" -and "${{ inputs.build_arch }}" -eq "arm64" )) {
             $NDKPATH = "${{ steps.setup-ndk.outputs.ndk-path }}"
             if ( "${{ inputs.build_os }}" -eq "Windows" ) {
               $NDKPATH = cygpath -m $NDKPATH
@@ -1629,17 +1629,17 @@ jobs:
 
       # NOTE(compnerd): we execute unconditionally as we reference outputs
       - uses: nttld/setup-ndk@v1
-        if: inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         id: setup-ndk
         with:
           ndk-version: ${{ inputs.ANDROID_NDK_VERSION }}
 
       - name: Configure LLVM
-        if: matrix.os != 'Android' || inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(matrix.os == 'Android' && inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         run: |
           # NOTE: used by `matrix.cc`
           $CLANG_CL = "cl"
-          if ( "${{ inputs.build_os }}" -ne "Windows" -or "${{ inputs.build_arch }}" -ne "arm64" ) {
+          if (-not ("${{ inputs.build_os }}" -eq "Windows" -and "${{ inputs.build_arch }}" -eq "arm64" )) {
             $NDKPATH = cygpath -m ${{ steps.setup-ndk.outputs.ndk-path }}
             $CMAKE_NDK_FLAG = "-DCMAKE_ANDROID_NDK=$NDKPATH"
             $SWIFT_NDK_FLAG = "-DSWIFT_ANDROID_NDK_PATH=$NDKPATH"
@@ -1662,13 +1662,13 @@ jobs:
                 -D LLVM_ENABLE_ASSERTIONS=YES
 
       - name: Configure Swift Standard Library
-        if: matrix.os != 'Android' || inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(matrix.os == 'Android' && inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         run: |
           # NOTE: used by `matrix.cc`
           $CLANG_CL = cygpath -m ${{ github.workspace }}/BuildRoot/Library/Developer/Toolchains/unknown-Asserts-development.xctoolchain/usr/bin/clang-cl.exe
 
           $SWIFTC = cygpath -m ${{ github.workspace }}/BuildRoot/Library/Developer/Toolchains/unknown-Asserts-development.xctoolchain/usr/bin/swiftc.exe
-          if ( "${{ inputs.build_os }}" -ne "Windows" -or "${{ inputs.build_arch }}" -ne "arm64" ) {
+          if (-not ("${{ inputs.build_os }}" -eq "Windows" -and "${{ inputs.build_arch }}" -eq "arm64" )) {
             $NDKPATH = cygpath -m ${{ steps.setup-ndk.outputs.ndk-path }}
             $CMAKE_NDK_FLAG = "-DCMAKE_ANDROID_NDK=$NDKPATH"
             $SWIFT_NDK_FLAG = "-DSWIFT_ANDROID_NDK_PATH=$NDKPATH"
@@ -1720,18 +1720,18 @@ jobs:
                 -D SWIFT_PATH_TO_SWIFT_SYNTAX_SOURCE=${{ github.workspace }}/SourceCache/swift-syntax `
                 -D SWIFT_PATH_TO_STRING_PROCESSING_SOURCE=${{ github.workspace }}/SourceCache/swift-experimental-string-processing
       - name: Build Swift Standard Library
-        if: matrix.os != 'Android' || inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(matrix.os == 'Android' && inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         run: |
           Remove-Item env:\SDKROOT
           cmake --build ${{ github.workspace }}/BinaryCache/swift
       - name: Install Swift Standard Library
-        if: matrix.os != 'Android' || inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(matrix.os == 'Android' && inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         run: |
           Remove-Item env:\SDKROOT
           cmake --build ${{ github.workspace }}/BinaryCache/swift --target install
 
       - uses: actions/upload-artifact@v4
-        if: matrix.os != 'Android' || inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(matrix.os == 'Android' && inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         with:
           name: ${{ matrix.os }}-stdlib-${{ matrix.arch }}
           path: ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/${{ matrix.os }}.platform
@@ -2013,17 +2013,17 @@ jobs:
 
     steps:
       - uses: actions/download-artifact@v4
-        if: matrix.os != 'Android' || inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(matrix.os == 'Android' && inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         with:
           name: libxml2-${{ matrix.os }}-${{ matrix.arch }}-${{ inputs.libxml2_version }}
           path: ${{ github.workspace }}/BuildRoot/Library/libxml2-${{ inputs.libxml2_version }}/usr
       - uses: actions/download-artifact@v4
-        if: matrix.os != 'Android' || inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(matrix.os == 'Android' && inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         with:
           name: curl-${{ matrix.os }}-${{ matrix.arch }}-${{ inputs.curl_version }}
           path: ${{ github.workspace }}/BuildRoot/Library/curl-${{ inputs.curl_version }}/usr
       - uses: actions/download-artifact@v4
-        if: matrix.os != 'Android' || inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(matrix.os == 'Android' && inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         with:
           name: zlib-${{ matrix.os }}-${{ matrix.arch }}-${{ inputs.zlib_version }}
           path: ${{ github.workspace }}/BuildRoot/Library/zlib-${{ inputs.zlib_version }}/usr
@@ -2034,7 +2034,7 @@ jobs:
           name: compilers-${{ inputs.build_arch }}
           path: ${{ github.workspace }}/BinaryCache/Library
       - uses: actions/download-artifact@v4
-        if: matrix.os != 'Android' || inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(matrix.os == 'Android' && inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         with:
           name: ${{ matrix.os }}-stdlib-${{ matrix.arch }}
           path: ${{ github.workspace }}/BinaryCache/Library/Developer/Platforms/${{ matrix.os }}.platform
@@ -2123,19 +2123,19 @@ jobs:
 
       # NOTE(compnerd): we execute unconditionally as we reference outputs
       - uses: nttld/setup-ndk@v1
-        if: inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         id: setup-ndk
         with:
           ndk-version: ${{ inputs.ANDROID_NDK_VERSION }}
 
       - name: Configure libdispatch
-        if: matrix.os != 'Android' || inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(matrix.os == 'Android' && inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         run: |
           # Workaround CMake 3.20 issue
           $CLANG_CL = cygpath -m ${{ github.workspace }}/BinaryCache/Library/Developer/Toolchains/unknown-Asserts-development.xctoolchain/usr/bin/clang-cl.exe
           $SWIFTC = cygpath -m ${{ github.workspace }}/BinaryCache/Library/Developer/Toolchains/unknown-Asserts-development.xctoolchain/usr/bin/swiftc.exe
 
-          if ( "${{ inputs.build_os }}" -ne "Windows" -or "${{ inputs.build_arch }}" -ne "arm64" ) {
+          if (-not ("${{ inputs.build_os }}" -eq "Windows" -and "${{ inputs.build_arch }}" -eq "arm64" )) {
             $NDKPATH = cygpath -m ${{ steps.setup-ndk.outputs.ndk-path }}
             $CMAKE_NDK_FLAG = "-DCMAKE_ANDROID_NDK=$NDKPATH"
             $SWIFT_NDK_FLAG = "-DSWIFT_ANDROID_NDK_PATH=$NDKPATH"
@@ -2178,18 +2178,18 @@ jobs:
                 -D BUILD_TESTING=NO `
                 -D ENABLE_SWIFT=YES
       - name: Build libdispatch
-        if: matrix.os != 'Android' || inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(matrix.os == 'Android' && inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         run: |
           cmake --build ${{ github.workspace }}/BinaryCache/libdispatch
 
       - name: Configure Foundation
-        if: matrix.os != 'Android' || inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(matrix.os == 'Android' && inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         run: |
           # Workaround CMake 3.20 issue
           $CLANG_CL = cygpath -m ${{ github.workspace }}/BinaryCache/Library/Developer/Toolchains/unknown-Asserts-development.xctoolchain/usr/bin/clang-cl.exe
           $SWIFTC = cygpath -m ${{ github.workspace }}/BinaryCache/Library/Developer/Toolchains/unknown-Asserts-development.xctoolchain/usr/bin/swiftc.exe
 
-          if ( "${{ inputs.build_os }}" -ne "Windows" -or "${{ inputs.build_arch }}" -ne "arm64" ) {
+          if (-not ("${{ inputs.build_os }}" -eq "Windows" -and "${{ inputs.build_arch }}" -eq "arm64" )) {
             $NDKPATH = cygpath -m ${{ steps.setup-ndk.outputs.ndk-path }}
             $CMAKE_NDK_FLAG = "-DCMAKE_ANDROID_NDK=$NDKPATH"
             $SWIFT_NDK_FLAG = "-DSWIFT_ANDROID_NDK_PATH=$NDKPATH"
@@ -2257,19 +2257,19 @@ jobs:
                 -D ZLIB_LIBRARY=${{ github.workspace }}/BuildRoot/Library/zlib-${{ inputs.zlib_version }}/usr/lib/$LIBZ `
                 -D SwiftFoundation_MACRO=${{ github.workspace }}/BinaryCache/Library/Developer/Toolchains/unknown-Asserts-development.xctoolchain/usr/bin
       - name: Build foundation
-        if: matrix.os != 'Android' || inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(matrix.os == 'Android' && inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         run: |
           cmake --build ${{ github.workspace }}/BinaryCache/foundation
 
       # TODO(compnerd) correctly version XCTest
       - name: Configure xctest
-        if: matrix.os != 'Android' || inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(matrix.os == 'Android' && inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         run: |
           # Workaround CMake 3.20 issue
           $CLANG_CL = cygpath -m ${{ github.workspace }}/BinaryCache/Library/Developer/Toolchains/unknown-Asserts-development.xctoolchain/usr/bin/clang-cl.exe
           $SWIFTC = cygpath -m ${{ github.workspace }}/BinaryCache/Library/Developer/Toolchains/unknown-Asserts-development.xctoolchain/usr/bin/swiftc.exe
 
-          if ( "${{ inputs.build_os }}" -ne "Windows" -or "${{ inputs.build_arch }}" -ne "arm64" ) {
+          if (-not ("${{ inputs.build_os }}" -eq "Windows" -and "${{ inputs.build_arch }}" -eq "arm64" )) {
             $NDKPATH = cygpath -m ${{ steps.setup-ndk.outputs.ndk-path }}
             $CMAKE_NDK_FLAG = "-DCMAKE_ANDROID_NDK=$NDKPATH"
             $SWIFT_NDK_FLAG = "-DSWIFT_ANDROID_NDK_PATH=$NDKPATH"
@@ -2312,18 +2312,18 @@ jobs:
                 -D Foundation_DIR=${{ github.workspace }}/BinaryCache/foundation/cmake/modules `
                 -D ENABLE_TESTING=NO
       - name: Build xctest
-        if: matrix.os != 'Android' || inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(matrix.os == 'Android' && inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         run: |
           cmake --build ${{ github.workspace }}/BinaryCache/xctest
 
       - name: Configure Testing
-        if: matrix.os != 'Android' || inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(matrix.os == 'Android' && inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         run: |
           # Workaround CMake 3.20 issue
           $CLANG_CL = cygpath -m ${{ github.workspace }}/BinaryCache/Library/Developer/Toolchains/unknown-Asserts-development.xctoolchain/usr/bin/clang-cl.exe
           $SWIFTC = cygpath -m ${{ github.workspace }}/BinaryCache/Library/Developer/Toolchains/unknown-Asserts-development.xctoolchain/usr/bin/swiftc.exe
 
-          if ( "${{ inputs.build_os }}" -ne "Windows" -or "${{ inputs.build_arch }}" -ne "arm64" ) {
+          if (-not ("${{ inputs.build_os }}" -eq "Windows" -and "${{ inputs.build_arch }}" -eq "arm64" )) {
             $NDKPATH = cygpath -m ${{ steps.setup-ndk.outputs.ndk-path }}
             $CMAKE_NDK_FLAG = "-DCMAKE_ANDROID_NDK=$NDKPATH"
             $SWIFT_NDK_FLAG = "-DSWIFT_ANDROID_NDK_PATH=$NDKPATH"
@@ -2365,30 +2365,30 @@ jobs:
                 -D Foundation_DIR=${{ github.workspace }}/BinaryCache/foundation/cmake/modules `
                 -D SwiftTesting_MACRO=${{ github.workspace }}/BinaryCache/Library/Developer/Toolchains/unknown-Asserts-development.xctoolchain/usr/bin/TestingMacros.dll
       - name: Build Testing
-        if: matrix.os != 'Android' || inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(matrix.os == 'Android' && inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         run: |
           cmake --build ${{ github.workspace }}/BinaryCache/testing
 
       - name: Install Testing
-        if: matrix.os != 'Android' || inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(matrix.os == 'Android' && inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         run: |
           cmake --build ${{ github.workspace }}/BinaryCache/testing --target install
       - name: Install xctest
-        if: matrix.os != 'Android' || inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(matrix.os == 'Android' && inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         run: |
           cmake --build ${{ github.workspace }}/BinaryCache/xctest --target install
       - name: Install foundation
-        if: matrix.os != 'Android' || inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(matrix.os == 'Android' && inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         run: |
           cmake --build ${{ github.workspace }}/BinaryCache/foundation --target install
       - name: Install libdispatch
-        if: matrix.os != 'Android' || inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(matrix.os == 'Android' && inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         run: |
           cmake --build ${{ github.workspace }}/BinaryCache/libdispatch --target install
 
       - uses: actions/setup-python@v5
       - uses: jannekem/run-python-script-action@v1
-        if: matrix.os != 'Android' || inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(matrix.os == 'Android' && inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         with:
           script: |
             import os
@@ -2406,7 +2406,7 @@ jobs:
               plistlib.dump({ 'DefaultProperties': { 'DEFAULT_USE_RUNTIME': 'MD' } }, plist)
 
       - uses: actions/upload-artifact@v4
-        if: matrix.os != 'Android' || inputs.build_os != 'Windows' || inputs.build_arch != 'arm64'
+        if: ${{ !(matrix.os == 'Android' && inputs.build_os == 'Windows' && inputs.build_arch == 'arm64') }}
         with:
           name: ${{ matrix.os }}-sdk-${{ matrix.arch }}
           path: ${{ github.workspace }}/BuildRoot/Library/Developer/Platforms/${{ matrix.os }}.platform