try bind-mount /var/run/docker.sock

Author: jpnurmi

.github/workflows/build.yml

@@ -59,7 +59,7 @@ jobs:
 
   build:
     needs: build-sentry-native
-    name: .NET (${{ matrix.container || matrix.os }})
+    name: .NET (${{ matrix.container.image || matrix.os }})
     runs-on: ${{ matrix.os }}
     container: ${{ matrix.container }}
 
@@ -73,7 +73,10 @@ jobs:
             target: Linux-arm64
           - os: ubuntu-latest
             target: Linux-musl
-            container: ghcr.io/getsentry/sentry-dotnet-alpine:3.21
+            container:
+              image: ghcr.io/getsentry/sentry-dotnet-alpine:3.21
+              volumes:
+                - /var/run/docker.sock:/var/run/docker.sock
           - os: macos-15 # Pin macos to get the version of Xcode that we need: https://github.com/actions/runner-images/issues/10703
           - os: windows-latest
           - os: windows-11-arm
@@ -214,7 +217,7 @@ jobs:
           path: src
 
       - name: Install Docker on Alpine Linux
-        if: ${{ contains(matrix.container, 'alpine') }}
+        if: ${{ contains(matrix.container.image, 'alpine') }}
         run: |
           sudo apk add docker-cli