diff --git a/pkgs/development/compilers/gerbil/unstable.nix b/pkgs/development/compilers/gerbil/unstable.nix
index 7b54438b5c9..d4ff3ca7a98 100644
--- a/pkgs/development/compilers/gerbil/unstable.nix
+++ b/pkgs/development/compilers/gerbil/unstable.nix
@@ -1,13 +1,13 @@
 { callPackage, fetchFromGitHub, gambit-unstable, gambit-support }:
 
 callPackage ./build.nix rec {
-  version = "unstable-2020-08-02";
-  git-version = "0.16-120-g3f248e13";
+  version = "unstable-2020-11-05";
+  git-version = "0.16-152-g808929ae";
   src = fetchFromGitHub {
     owner = "vyzo";
     repo = "gerbil";
-    rev = "3f248e139dfa11be74284fc812253fbecafbaf31";
-    sha256 = "18v192cypj0nbmfcyflm8qnwp27qwy65m0a19ggs47wwbzhgvgqh";
+    rev = "808929aeb8823959191f35df53bc0c0150911b4b";
+    sha256 = "0d9k2gkrs9qvlnk7xa3gjzs3gln3ydds7yd2313pvbw4q2lcz8iw";
   };
   inherit gambit-support;
   gambit = gambit-unstable;