diff --git a/pkgs/development/compilers/gambit/unstable.nix b/pkgs/development/compilers/gambit/unstable.nix
index 067a409ac1c..15db82fc9fb 100644
--- a/pkgs/development/compilers/gambit/unstable.nix
+++ b/pkgs/development/compilers/gambit/unstable.nix
@@ -1,12 +1,13 @@
-{ stdenv, callPackage, fetchgit }:
+{ stdenv, callPackage, fetchFromGitHub }:
 
 callPackage ./build.nix {
-  version = "unstable-2018-09-03";
-# git-version = "4.9.0";
-  SRC = fetchgit {
-    url = "https://github.com/feeley/gambit.git";
-    rev = "7cdc7e7b9194b2c088c0667efaf7686a4ffd0d8a";
-    sha256 = "06mmi8jkinihfirz4gjfw2lhxhskiqf3d47sihzx10r60asyqcxg";
+  version = "unstable-2018-11-19";
+# git-version = "4.9.1-8-g61c6cb50";
+  src = fetchFromGitHub {
+    owner = "feeley";
+    repo = "gambit";
+    rev = "61c6cb500f4756be1e52095d5ab4501752525a70";
+    sha256 = "1knpb40y1g09c6yqd2fsxm3bk56bl5xrrwfsd7nqa497x6ngm5pn";
   };
   inherit stdenv;
 }