diff --git a/flake.nix b/flake.nix
index b18a276..238b8f4 100644
--- a/flake.nix
+++ b/flake.nix
@@ -17,7 +17,7 @@
 
       # Overlay to add systant to pkgs
       overlays.default = final: prev: {
-        systant = final.callPackage ./nix/package.nix { };
+        systant = final.callPackage ./nix/package.nix { src = self; };
       };
     }
     //
diff --git a/nix/package.nix b/nix/package.nix
index 15eda2f..25bbbae 100644
--- a/nix/package.nix
+++ b/nix/package.nix
@@ -4,6 +4,7 @@
   stdenv,
   bun,
   cacert,
+  src,  # passed from flake.nix
 }:
 
 let
@@ -14,15 +15,7 @@ let
     pname = "systant-deps";
     version = "0.1.0";
 
-    src = lib.fileset.toSource {
-      root = ./..;
-      fileset = lib.fileset.unions [
-        ./../package.json
-        ./../bun.lock
-      ];
-    };
-
-    nativeBuildInputs = [ bun cacert ];
+    inherit src;
 
     buildPhase = ''
       export HOME=$TMPDIR
@@ -33,6 +26,8 @@ let
       cp -r node_modules $out
     '';
 
+    nativeBuildInputs = [ bun cacert ];
+
     outputHashMode = "recursive";
     outputHashAlgo = "sha256";
     # To update: nix build .#systant 2>&1 | grep 'got:'
@@ -43,15 +38,7 @@ stdenv.mkDerivation {
   pname = "systant";
   version = "0.1.0";
 
-  src = lib.fileset.toSource {
-    root = ./..;
-    fileset = lib.fileset.unions [
-      ./../index.ts
-      ./../src
-      ./../package.json
-      ./../tsconfig.json
-    ];
-  };
+  inherit src;
 
   nativeBuildInputs = [ bun ];