modules/shared/community-builder: disable grml zsh prompt on darwin

modules/shared/community-builder.nix

@@ -68,14 +68,17 @@
       useBabelfish = true;
     };
 
-    programs.zsh = {
+    programs.zsh =
-      enable = true;
+      {
-      # https://grml.org/zsh/grmlzshrc.html
+        enable = true;
-      # https://grml.org/zsh/grml-zsh-refcard.pdf
+      }
-      interactiveShellInit = ''
+      // lib.optionalAttrs pkgs.stdenv.hostPlatform.isLinux {
-        source ${pkgs.grml-zsh-config}/etc/zsh/zshrc
+        # https://grml.org/zsh/grmlzshrc.html
-      '';
+        # https://grml.org/zsh/grml-zsh-refcard.pdf
-      promptInit = ""; # otherwise it'll override the grml prompt
+        interactiveShellInit = ''
-    };
+          source ${pkgs.grml-zsh-config}/etc/zsh/zshrc
+        '';
+        promptInit = ""; # otherwise it'll override the grml prompt
+      };
   };
 }