Break up dependencies in different groups

flake.nix

@@ -165,38 +165,43 @@
               old.preInstallCheck;
         });
 
-        native_build_inputs = (with pkgs; [
+        buildToolsDeps = (with pkgs; [
             cmake
             ninja
-            ccache
-            git'
-            zsh
-            zsh-autosuggestions
-            zsh-autocomplete
-            zsh-syntax-highlighting
-            python3
-            iwyu
-            gc
             llvm
             llvmPackages_17.mlir
             llvmPackages_17.clang
-          ]);
+            iwyu
+        ]);
 
-        build_inputs = with pkgs; [
+        buildDevToolsDeps = (with pkgs; [
+          ccache
+          git'
+          python3
+          zsh
+          zsh-autosuggestions
+          zsh-autocomplete
+          zsh-syntax-highlighting
+        ]);
+
+        buildDeps = (with pkgs; [
           gc
-          gtest
-          gmock
           zlib'
           llvm
           llvmPackages_17.mlir
           llvmPackages_17.clang
-        ];
+        ]);
+
+        testDeps = (with pkgs; [
+          gtest
+          gmock
+        ]);
 
       in {
         inherit pkgs;
         devShells.default = (pkgs.mkShell.override { stdenv = stdenv';}) {
-          nativeBuildInputs = native_build_inputs;
+          nativeBuildInputs = buildDevToolsDeps ++ buildToolsDeps;
-          buildInputs = build_inputs;
+          buildInputs = buildDeps ++ testDeps;
           shellHook =
             ''
                 ZDOTDIR=${zshDir} zsh -d && exit