diff --git a/pkgs/development/compilers/gerbil/unstable.nix b/pkgs/development/compilers/gerbil/unstable.nix
index bd9c3994dd49..96bd86b26166 100644
--- a/pkgs/development/compilers/gerbil/unstable.nix
+++ b/pkgs/development/compilers/gerbil/unstable.nix
@@ -1,13 +1,14 @@
-{ stdenv, callPackage, fetchgit, gambit-unstable }:
+{ stdenv, callPackage, fetchFromGitHub, gambit-unstable }:
 
 callPackage ./build.nix {
-  version = "unstable-2018-09-06";
-  git-version = "0.14-DEV";
-  GAMBIT = gambit-unstable;
-  SRC = fetchgit {
-    url = "https://github.com/vyzo/gerbil.git";
-    rev = "184cb635c82517d5d75d7966dcdf1d25ad863dac";
-    sha256 = "1ljzbpc36i9zpzfwra5hpfbgzj1dyzzp50h5jf976n8qr9x4l7an";
+  version = "unstable-2018-11-19";
+  git-version = "0.15-DEV-2-g7d09a4ce";
+  gambit = gambit-unstable;
+  src = fetchFromGitHub {
+    owner = "vyzo";
+    repo = "gerbil";
+    rev = "7d09a4cebe03d755a1791e77279e156a74e07685";
+    sha256 = "1mqi9xcjk59sqbh1fx65a4fa4mqm35py4xqxq6086bcyhkm1nzwa";
   };
   inherit stdenv;
 }