diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 89b3f11f481f..7a78ce54b5e2 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -7258,7 +7258,7 @@ with pkgs;
     fmt_12
     ;
 
-  fmt = fmt_11;
+  fmt = fmt_12;
 
   fplll = callPackage ../development/libraries/fplll { };
   fplll_20160331 = callPackage ../development/libraries/fplll/20160331.nix { };