diff --git a/pkgs/development/compilers/gerbil/unstable.nix b/pkgs/development/compilers/gerbil/unstable.nix
index 96bd86b26166..b96ff53b56c2 100644
--- a/pkgs/development/compilers/gerbil/unstable.nix
+++ b/pkgs/development/compilers/gerbil/unstable.nix
@@ -1,14 +1,14 @@
 { stdenv, callPackage, fetchFromGitHub, gambit-unstable }:
 
 callPackage ./build.nix {
-  version = "unstable-2018-11-19";
-  git-version = "0.15-DEV-2-g7d09a4ce";
+  version = "unstable-2019-01-25";
+  git-version = "0.15";
   gambit = gambit-unstable;
   src = fetchFromGitHub {
     owner = "vyzo";
     repo = "gerbil";
-    rev = "7d09a4cebe03d755a1791e77279e156a74e07685";
-    sha256 = "1mqi9xcjk59sqbh1fx65a4fa4mqm35py4xqxq6086bcyhkm1nzwa";
+    rev = "8c1aa2ca129a380de9cf668a7f3f6d56e56cbf94";
+    sha256 = "1ff1gpl0bl1pbs68bxax82ikw4bzbkrj4a6l775ziwyfndjggl66";
   };
   inherit stdenv;
 }