diff --git a/direnvrc b/direnvrc
index 4bd03da..4dd7a32 100644
--- a/direnvrc
+++ b/direnvrc
@@ -361,7 +361,7 @@ use_nix() {
 
   local layout_dir path version
   layout_dir=$(direnv_layout_dir)
-  if path=$(_nix eval --impure --expr "<nixpkgs>" 2>/dev/null); then
+  if path=$(realpath -e "$(_nix eval --impure --expr "<nixpkgs>" 2>/dev/null)"); then
     if [[ -f "${path}/.version-suffix" ]]; then
       version=$(<"${path}/.version-suffix")
     elif [[ -f "${path}/.git/HEAD" ]]; then