diff --git a/pkgs/applications/virtualization/lkl/default.nix b/pkgs/applications/virtualization/lkl/default.nix
index f2481e25a8f..3bb12836a03 100644
--- a/pkgs/applications/virtualization/lkl/default.nix
+++ b/pkgs/applications/virtualization/lkl/default.nix
@@ -4,25 +4,27 @@
 stdenv.mkDerivation rec {
   pname = "lkl";
   version = "2019-10-04";
-  rev  = "06ca3ddb74dc5b84fa54fa1746737f2df502e047";
 
   outputs = [ "dev" "lib" "out" ];
 
+  src = fetchFromGitHub {
+    owner  = "lkl";
+    repo   = "linux";
+    rev  = "06ca3ddb74dc5b84fa54fa1746737f2df502e047";
+    sha256 = "0qjp0r338bwgrqdsvy5mkdh7ryas23m47yvxfwdknfyl0k3ylq62";
+  };
+
   nativeBuildInputs = [ bc bison flex python3 ];
 
   buildInputs = [ fuse libarchive ];
 
-  src = fetchFromGitHub {
-    inherit rev;
-    owner  = "lkl";
-    repo   = "linux";
-    sha256 = "0qjp0r338bwgrqdsvy5mkdh7ryas23m47yvxfwdknfyl0k3ylq62";
-  };
+  postPatch = ''
+    # Fix a /usr/bin/env reference in here that breaks sandboxed builds
+    patchShebangs arch/lkl/scripts
 
-  # Fix a /usr/bin/env reference in here that breaks sandboxed builds
-  prePatch = "patchShebangs arch/lkl/scripts";
-  # Fixup build with newer Linux headers: https://github.com/lkl/linux/pull/484
-  postPatch = "sed '1i#include <linux/sockios.h>' -i tools/lkl/lib/hijack/xlate.c";
+    # Fixup build with newer Linux headers: https://github.com/lkl/linux/pull/484
+    sed '1i#include <linux/sockios.h>' -i tools/lkl/lib/hijack/xlate.c
+  '';
 
   installPhase = ''
     mkdir -p $out/bin $lib/lib $dev
@@ -61,7 +63,7 @@ stdenv.mkDerivation rec {
       overhead
     '';
     homepage    = "https://github.com/lkl/linux/";
-    platforms   = [ "x86_64-linux" "aarch64-linux" "armv7l-linux" "armv6l-linux" ]; # Darwin probably works too but I haven't tested it
+    platforms   = platforms.linux; # Darwin probably works too but I haven't tested it
     license     = licenses.gpl2;
     maintainers = with maintainers; [ copumpkin ];
   };