diff --git a/.github/workflows/swift_package_test.yml b/.github/workflows/swift_package_test.yml
index c86c42d7..ea8edc42 100644
--- a/.github/workflows/swift_package_test.yml
+++ b/.github/workflows/swift_package_test.yml
@@ -594,6 +594,20 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
+      - name: Checkout swiftlang/github-workflows repository
+        if: ${{ github.repository != 'swiftlang/github-workflows' }}
+        uses: actions/checkout@v4
+        with:
+          repository: swiftlang/github-workflows
+          path: github-workflows
+      - name: Determine script-root path
+        id: script_path
+        run: |
+          if ("${{ github.repository }}" -eq "swiftlang/github-workflows") {
+            echo "root=$env:GITHUB_WORKSPACE" >> $env:GITHUB_OUTPUT
+          } else {
+            echo "root=$env:GITHUB_WORKSPACE/github-workflows" >> $env:GITHUB_OUTPUT
+          }
       - name: Provide token
         if: ${{ inputs.needs_token }}
         run: |
@@ -618,17 +632,10 @@ jobs:
           echo "image=$Image" >> "$env:GITHUB_OUTPUT"
       - name: Install Visual Studio Build Tools
         if: ${{ !inputs.enable_windows_docker }}
-        run: |
-          Invoke-WebRequest -Uri https://raw.githubusercontent.com/swiftlang/github-workflows/refs/heads/main/.github/workflows/scripts/windows/install-vsb.ps1 -OutFile $env:TEMP\install-vsb.ps1
-          . $env:TEMP\install-vsb.ps1
-          del $env:TEMP\install-vsb.ps1
+        run: . ${{ steps.script_path.outputs.root }}/.github/workflows/scripts/windows/install-vsb.ps1
       - name: Install Swift
         if: ${{ !inputs.enable_windows_docker }}
-        run: |
-          Invoke-WebRequest -Uri https://raw.githubusercontent.com/swiftlang/github-workflows/refs/heads/main/.github/workflows/scripts/windows/swift/install-swift.ps1 -OutFile $env:TEMP\install-swift.ps1
-          Invoke-WebRequest -Uri https://raw.githubusercontent.com/swiftlang/github-workflows/refs/heads/main/.github/workflows/scripts/windows/swift/install-swift-${{ matrix.swift_version }}.ps1 -OutFile $env:TEMP\install-swift-${{ matrix.swift_version }}.ps1
-          . $env:TEMP\install-swift-${{ matrix.swift_version }}.ps1
-          del $env:TEMP\install-swift*.ps1
+        run: . ${{ steps.script_path.outputs.root }}/.github/workflows/scripts/windows/swift/install-swift-${{ matrix.swift_version }}.ps1
       - name: Create test script
         run: |
           mkdir $env:TEMP\test-script
@@ -656,9 +663,8 @@ jobs:
 
           if ("${{ inputs.enable_cross_pr_testing && github.event_name == 'pull_request' }}" -eq "true") {
             echo @'
-          Invoke-WebRequest https://raw.githubusercontent.com/swiftlang/github-workflows/refs/heads/main/.github/workflows/scripts/cross-pr-checkout.swift -OutFile $env:TEMP\cross-pr-checkout.swift
           # Running in script mode fails on Windows (https://github.com/swiftlang/swift/issues/77263), compile and run the script.
-          Invoke-Program swiftc -sdk $env:SDKROOT $env:TEMP\cross-pr-checkout.swift -o $env:TEMP\cross-pr-checkout.exe
+          Invoke-Program swiftc -sdk $env:SDKROOT ${{ steps.script_path.outputs.root }}/.github/workflows/scripts/cross-pr-checkout.swift -o $env:TEMP\cross-pr-checkout.exe
           Invoke-Program $env:TEMP\cross-pr-checkout.exe "${{ github.repository }}" "${{ github.event.number }}"
           '@ >> $env:TEMP\test-script\run.ps1
           }