diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index de1a291019e6..63896c6389f4 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -20383,7 +20383,7 @@ with pkgs;
 
   inherit (callPackages ../development/libraries/fmt { }) fmt_8 fmt_9 fmt_10;
 
-  fmt = fmt_9;
+  fmt = fmt_10;
 
   fplll = callPackage ../development/libraries/fplll { };
   fplll_20160331 = callPackage ../development/libraries/fplll/20160331.nix { };