nix: don't strip if we are building a debug version of the package (#7395)

.github/workflows/test.yml

@@ -211,8 +211,23 @@ jobs:
           name: ghostty
           authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
 
-      - name: Test NixOS package build
-        run: nix build .#ghostty
+      - name: Test release NixOS package build
+        run: nix build .#ghostty-releasefast
+
+      - name: Check version
+        run: result/bin/ghostty +version | grep -q 'builtin.OptimizeMode.ReleaseFast'
+
+      - name: Check to see if the binary has been stripped
+        run: nm result/bin/.ghostty-wrapped 2>&1 | grep -q 'no symbols'
+
+      - name: Test debug NixOS package build
+        run: nix build .#ghostty-debug
+
+      - name: Check version
+        run: result/bin/ghostty +version | grep -q 'builtin.OptimizeMode.Debug'
+
+      - name: Check to see if the binary has not been stripped
+        run: nm result/bin/.ghostty-wrapped 2>&1 | grep -q 'main_ghostty.main'
 
   build-dist:
     runs-on: namespace-profile-ghostty-md

nix/package.nix

@@ -36,6 +36,7 @@
   buildInputs = import ./build-support/build-inputs.nix {
     inherit pkgs lib stdenv enableX11 enableWayland;
   };
+  strip = optimize != "Debug" && optimize != "ReleaseSafe";
 in
   stdenv.mkDerivation (finalAttrs: {
     pname = "ghostty";
@@ -87,6 +88,7 @@ in
     buildInputs = buildInputs;
 
     dontConfigure = true;
+    dontStrip = !strip;
 
     GI_TYPELIB_PATH = gi_typelib_path;
 
@@ -96,6 +98,7 @@ in
       "-Dversion-string=${finalAttrs.version}-${revision}-nix"
       "-Dgtk-x11=${lib.boolToString enableX11}"
       "-Dgtk-wayland=${lib.boolToString enableWayland}"
+      "-Dstrip=${lib.boolToString strip}"
     ];
 
     outputs = [