diff --git a/default.nix b/default.nix
index 73f875d..30cb993 100644
--- a/default.nix
+++ b/default.nix
@@ -8,6 +8,7 @@ in {
       ## base
       stable.stdenv
       ## erlang
+      stable.libtool
       stable.autoconf
       stable.automake
       stable.erlangR23 # OTP 23.3.4.4