1 files changed, 4 insertions, 6 deletions
diff --git a/pkgs/development/tools/icestorm/default.nix b/pkgs/development/tools/icestorm/default.nix
index 8b3cd17a7b27..6351a01501d3 100644
--- a/pkgs/development/tools/icestorm/default.nix
+++ b/pkgs/development/tools/icestorm/default.nix
@@ -2,20 +2,18 @@
 
 stdenv.mkDerivation rec {
   name = "icestorm-${version}";
-  version = "2018.02.04";
+  version = "2018.02.14";
 
   src = fetchFromGitHub {
     owner  = "cliffordwolf";
     repo   = "icestorm";
-    rev    = "722790ad3cdb497e1b13cd1b4368d8380371eb37";
-    sha256 = "0l04c6dshhhdcgqg1bdlw215wbn52fsg2fm2cvavhvf64c18lwd1";
+    rev    = "edbf5fce90ff0e71922a54241a1aec914cc3e230";
+    sha256 = "01d6xv5c4x8w8lamc8n3vnqsyn7ykhh1ws7k96d6ij5fs52k94xb";
   };
 
   nativeBuildInputs = [ pkgconfig ];
   buildInputs = [ python3 libftdi ];
-  preBuild = ''
-    makeFlags="PREFIX=$out $makeFlags"
-  '';
+  makeFlags = [ "PREFIX=$(out)" ];
 
   meta = {
     description = "Documentation and tools for Lattice iCE40 FPGAs";