diff --git a/.nix/config.nix b/.nix/config.nix
index 5b8229982..2f82da4a6 100644
--- a/.nix/config.nix
+++ b/.nix/config.nix
@@ -57,7 +57,7 @@
     coq-elpi.override.version = "master";
     hierarchy-builder.override.version = "master";
     mathcomp.override.version = "master";
-    mathcomp-bigenough.override.version = "1.0.1";
+    mathcomp-bigenough.override.version = "master";
     mathcomp-finmap.override.version = "master";
   }; ocamlPackages = { elpi.override.version = "1.19.2"; }; };
 
diff --git a/.nix/coq-nix-toolbox.nix b/.nix/coq-nix-toolbox.nix
index 3ac5205c1..564964964 100644
--- a/.nix/coq-nix-toolbox.nix
+++ b/.nix/coq-nix-toolbox.nix
@@ -1 +1 @@
-"66abb687550ec2800bc1724036cfb5d9656c901c"
+"53c930417a1185c9d9e87f9a79e2479004a04954"