diff --git a/pkgs/tools/misc/dumptorrent/default.nix b/pkgs/tools/misc/dumptorrent/default.nix
index 12232c414fd3..3199bae9987e 100644
--- a/pkgs/tools/misc/dumptorrent/default.nix
+++ b/pkgs/tools/misc/dumptorrent/default.nix
@@ -9,9 +9,9 @@ stdenv.mkDerivation rec {
       sha256 = "073h03bmpfdy15qh37lvppayld2747i4acpyk0pm5nf2raiak0zm";
     };
 
-    patchPhase = ''
+    postPatch = ''
       substituteInPlace Makefile \
-        --replace "gcc" "cc"
+        --replace "gcc" "$CC"
     '';
 
     installPhase = ''