diff --git a/default.nix b/default.nix
index 064ef87..aefa876 100644
--- a/default.nix
+++ b/default.nix
@@ -36,7 +36,7 @@
 
 {
   sources ? import ./npins,
-  pkgs ? import sources.nixpkgs { },
+  pkgs ? import sources.nixpkgs { overlays = [ ]; },
   nix-pkgs ? import sources.nix-pkgs { inherit pkgs; },
 }:
 
diff --git a/lib/colmena/wrapper.sh.in b/lib/colmena/wrapper.sh.in
index 4c1ba17..b1efac3 100644
--- a/lib/colmena/wrapper.sh.in
+++ b/lib/colmena/wrapper.sh.in
@@ -28,4 +28,4 @@ if [[ $1 == 'apply' ]]; then
 	doChecks
 fi
 
-exec @colmena@ "$@"
+exec @colmena@ --nix-option nix-path "" "$@"