diff --git a/builder.sh b/builder.sh
index 857cefd..bdd843d 100755
--- a/builder.sh
+++ b/builder.sh
@@ -1,7 +1,5 @@
 source $stdenv/setup
 
-PATH=$perl/bin:$PATH
-
 tar xvfz $src
 cd namd-*
 
diff --git a/namd.nix b/namd.nix
index 2421830..6ff7621 100644
--- a/namd.nix
+++ b/namd.nix
@@ -9,13 +9,8 @@ stdenv.mkDerivation {
   };
 
 buildInputs = [
+   perl
    bash 
    tcsh
  ];
-
-
-
-
-
-  inherit perl; 
 }