diff --git a/pkgs/applications/networking/p2p/opentracker/default.nix b/pkgs/applications/networking/p2p/opentracker/default.nix
index 82480b1ed21..581560ae78b 100644
--- a/pkgs/applications/networking/p2p/opentracker/default.nix
+++ b/pkgs/applications/networking/p2p/opentracker/default.nix
@@ -11,6 +11,15 @@ stdenv.mkDerivation {
 
   buildInputs = [ libowfat zlib ];
 
+  postPatch = ''
+    substituteInPlace Makefile --replace \
+      'LIBOWFAT_HEADERS=$(PREFIX)/libowfat' \
+      'LIBOWFAT_HEADERS=${libowfat}/include/libowfat'
+    substituteInPlace Makefile --replace \
+      'LIBOWFAT_LIBRARY=$(PREFIX)/libowfat' \
+      'LIBOWFAT_LIBRARY=${libowfat}/lib'
+  '';
+
   installPhase = ''
     runHook preInstall
     install -D opentracker $out/bin/opentracker