[CI] Forgejo tests

.forgejo/workflows/build.yaml

@@ -1,7 +1,7 @@
 on: [push]
 jobs:
   test:
-    runs-on: nix 
+    runs-on: nix
     steps:
-      - uses: actions/checkout@v3
-      - run: nix --version
+      - uses: actions/checkout@v4
+      - run: nix-fast-build --no-nom

checks/default.nix

@@ -1,7 +1,10 @@
 {
-  perSystem = {config, ...}: {
+  perSystem = {config, pkgs, ...}: {
     checks = {
       inherit (config.packages) ccrEmacs;
+      test = pkgs.hello.overrideDerivation (_: {
+	name = "test";
+      });
     };
   };
 }