Specify node and jdk versions

Author: waterlens

.github/workflows/nix.yml

@@ -12,5 +12,10 @@ jobs:
       - uses: actions/checkout@v3
       - name: Install Nix
         uses: DeterminateSystems/nix-installer-action@main
-      - name: Run Test
-        run: nix develop --command sbt compilerJVM/test
+      - uses: rrbutani/use-nix-shell-action@v1
+        with:
+          devShell: .#default
+      - name: Run test
+        run: sbt -J-Xmx4096M -J-Xss4M test
+      - name: Check no changes
+        run: git diff-files -p --exit-code

flake.nix

@@ -11,7 +11,7 @@
       (system:
       let 
         sbtOverlay = self: super: {
-          sbt = super.sbt.override { jre = super.jdk17; };
+          sbt = super.sbt.override { jre = super.jdk8_headless; };
         };
         pkgs = import nixpkgs { 
           inherit system;
@@ -26,7 +26,7 @@
               gmp
               mimalloc
               sbt
-              nodejs
+              nodejs_18
             ];
           };
       });