Fix windows build

.github/workflows/build.yml

@@ -59,6 +59,23 @@ jobs:
           echo "CC=clang" >> $GITHUB_ENV
           echo "CXX=clang++" >> $GITHUB_ENV
 
+      - name: Add msbuild to PATH (Windows)
+        if: startsWith(runner.os, 'Windows')
+        uses: microsoft/setup-msbuild@v2
+
+      - name: Install (Windows)
+        if: startsWith(runner.os, 'Windows')
+        shell: cmd
+        run: |
+          :: See https://github.com/microsoft/vswhere/wiki/Find-VC
+          for /f "usebackq delims=*" %%i in (`vswhere -latest -property installationPath`) do (
+            call "%%i"\Common7\Tools\vsdevcmd.bat -arch=x86 -host_arch=x64
+          )
+          :: Loop over all environment variables and make them global.
+          for /f "delims== tokens=1,2" %%a in ('set') do (
+            echo>>"%GITHUB_ENV%" %%a=%%b
+          )
+
       - name: Checking out MM:Source
         uses: actions/checkout@v4
         with:
@@ -74,7 +91,7 @@ jobs:
       - name: Setting up ambuild
         run: |
           python -m pip install wheel
-          pip install git+https://github.com/accelerator74/ambuild@nog3
+          pip install git+https://github.com/accelerator74/ambuild
 
       - name: Checking out hl2sdk-l4d
         uses: actions/checkout@v4
@@ -96,7 +113,6 @@ jobs:
           path: src
 
       - name: Compiling ${{ github.event.repository.name }}-l4d files
-        shell: bash
         working-directory: src
         run: |
           mkdir build_l4d
@@ -105,7 +121,6 @@ jobs:
           ambuild
 
       - name: Compiling ${{ github.event.repository.name }}-l4d2 files
-        shell: bash
         working-directory: src
         run: |
           mkdir build_l4d2