diff --git a/modules/ccache.nix b/modules/ccache.nix
index c75caba..866df11 100644
--- a/modules/ccache.nix
+++ b/modules/ccache.nix
@@ -2,10 +2,46 @@
 , config
 , ...
 }: {
-  config.environment.persistence."/nix/persist".users.${username}.directories = [
-    {
-      directory = ".cache/ccache";
-      mode = "0700";
-    }
-  ];
+  config = {
+    environment.persistence = {
+      "/nix/persist".users.${username}.directories = [
+        {
+          directory = ".cache/ccache";
+          mode = "0700";
+        }
+      ];
+      "/large/persist".directories = [ config.programs.ccache.cacheDir ];
+    };
+    programs.ccache.enable = true;
+    /* nixpkgs.config.replaceStdenv = { pkgs }: pkgs.ccacheStdenv; */
+    /* nixpkgs.config.allowBroken = true; */
+    nix.settings.extra-sandbox-paths = [ config.programs.ccache.cacheDir ];
+    nixpkgs.overlays = [
+      (self: super: {
+        ccacheWrapper = super.ccacheWrapper.override {
+          extraConfig = ''
+            export CCACHE_COMPRESS=1
+            export CCACHE_DIR="${config.programs.ccache.cacheDir}"
+            export CCACHE_UMASK=007
+            if [ ! -d "$CCACHE_DIR" ]; then
+              echo "====="
+              echo "Directory '$CCACHE_DIR' does not exist"
+              echo "Please create it with:"
+              echo "  sudo mkdir -m0770 '$CCACHE_DIR'"
+              echo "  sudo chown root:nixbld '$CCACHE_DIR'"
+              echo "====="
+              exit 1
+            fi
+            if [ ! -w "$CCACHE_DIR" ]; then
+              echo "====="
+              echo "Directory '$CCACHE_DIR' is not accessible for user $(whoami)"
+              echo "Please verify its access permissions"
+              echo "====="
+              exit 1
+            fi
+          '';
+        };
+      })
+    ];
+  };
 }