diff --git a/pkgs/os-specific/linux/i2c-tools/default.nix b/pkgs/os-specific/linux/i2c-tools/default.nix
index b3fd34f665e..5b061183356 100644
--- a/pkgs/os-specific/linux/i2c-tools/default.nix
+++ b/pkgs/os-specific/linux/i2c-tools/default.nix
@@ -11,13 +11,14 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ perl ];
 
-  patchPhase = ''
+  postPatch = ''
     substituteInPlace eeprom/decode-edid --replace "/usr/sbin/parse-edid" "${read-edid}/bin/parse-edid"
     substituteInPlace stub/i2c-stub-from-dump --replace "/sbin/" ""
   '';
 
-  installPhase = ''
-    make install PREFIX=$out
+  makeFlags = [ "PREFIX=${placeholder "out"}" ];
+
+  postInstall = ''
     rm -rf $out/include # Installs include/linux/i2c-dev.h that conflics with kernel headers
   '';