diff --git a/shell.nix b/shell.nix
index 4ae76d6..5c1fc73 100644
--- a/shell.nix
+++ b/shell.nix
@@ -19,8 +19,10 @@ pkgs.mkShell {
     gpg-connect-agent reloadagent /bye
 
     # Import public key
+    export KEY_URL="$(gpg --card-status | grep URL | cut -d' ' -f6)"
+    echo $KEY_URL
 
-    curl $(gpg --card-status | grep URL | cut -d' ' -f6) | gpg --import
+    curl $KEY_URL | gpg --import
     gpg --card-status
 
     touch dummy