diff --git a/pkgs/development/compilers/gerbil/unstable.nix b/pkgs/development/compilers/gerbil/unstable.nix
index 6e60ea6fea4..a9618a7e066 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-2019-02-09";
-  git-version = "0.16-DEV-15-gafc20fc2";
+  version = "unstable-2019-08-11";
+  git-version = "0.16-DEV-132-gcb58f9a3";
   gambit = gambit-unstable;
   src = fetchFromGitHub {
     owner = "vyzo";
     repo = "gerbil";
-    rev = "afc20fc21030e8445b46b8267cc4c52cfd662aad";
-    sha256 = "02v16zya9zryjs4wallibp1kvnpba60aw15y4k7zhddc71qjfbhw";
+    rev = "cb58f9a30630a6f3e85a55f2c1dcc654f517ffed";
+    sha256 = "18jh64v1gi6z3pks9zf19f2wcjpv21cs270dnaq617kgwp53vysh";
   };
   inherit stdenv;
 }