Should get things where we need them

.github/workflows/ci-pipeline.yml

@@ -97,6 +97,8 @@ jobs:
     name: Validate Nix Flake
     needs: start-gate
     runs-on: ubuntu-latest
+    env:
+      TEST_TGS_VERSION: "6.17.0" # Version we use here doesn't matter as it won't be executed. Just used to download a zip and calc hash
     steps:
       - name: Setup Nix
         uses: cachix/install-nix-action@v31
@@ -113,6 +115,24 @@ jobs:
         with:
           ref: "refs/pull/${{ inputs.pull_request_number }}/merge"
 
+      - name: Replace current TGS version with test version
+        run:
+          CURRENT_TGS_VERSION="$(xmlstarlet sel -N X="http://schemas.microsoft.com/developer/msbuild/2003" --template --value-of /X:Project/X:PropertyGroup/X:TgsCoreVersion build/Version.props)"
+          sed -i -e "s/<TgsCoreVersion>${CURRENT_TGS_VERSION}/<TgsCoreVersion>${{ env.TEST_TGS_VERSION }}" build/Version.props
+
+      - name: Retrieve ServerConsole.zip Artifact
+        run: |
+          mkdir release
+          curl -L https://github.com/tgstation/tgstation-server/releases/download/tgstation-server-v${{ env.TEST_TGS_VERSION }}/ServerConsole.zip -f -o release/ServerConsole.zip
+
+      - name: Regenerate Nix Hash
+        run: |
+          nix hash path ./release > build/package/nix/ServerConsole.sha256
+          cat build/package/nix/ServerConsole.sha256
+
+      - name: Cleanup Download
+        run: rm -rf ./release
+
       - name: Check Flake
         run: |
           cd build/package/nix