diff --git a/default.nix b/default.nix
index 55c9ed9e3..635ead71e 100644
--- a/default.nix
+++ b/default.nix
@@ -6,5 +6,5 @@ runCommand "nix-repl"
     mkdir -p $out/bin
     g++ -O3 -Wall -o $out/bin/nix-repl ${./nix-repl.cc} \
       -I${nixUnstable}/include/nix -L${nixUnstable}/lib/nix \
-      -lexpr -lmain -lreadline
+      -lexpr -lmain -lreadline -lgc
   ''