added packages to devenv

devenv.nix

@@ -6,11 +6,12 @@
 
   # https://devenv.sh/packages/
   packages = with pkgs; [
+    nixfmt # needed for Nix IDE?
     git
     # rustc rustfmt cargo
     trunk cargo-generate
     # LLVM tools for WebAssembly compilation
-    # llvm
+    llvm
     lld
   ];
 
@@ -39,9 +40,15 @@
     echo hello from $GREET
   '';
 
+  scripts.versions.exec = ''
+    git --version
+    uv run --locked python --version
+    rustc --version
+  '';
+
   enterShell = ''
     hello
-    git --version
+    versions
   '';
 
   # https://devenv.sh/tasks/
@@ -53,9 +60,7 @@
   # https://devenv.sh/tests/
   enterTest = ''
     echo "Running tests"
-    git --version
-    uv run --locked python --version
-    rustc --version
+    versions
   '';
 
   # https://devenv.sh/git-hooks/