diff --git a/artiq-full/conda-channel.nix b/artiq-full/conda-channel.nix
index 06132e4..e54c356 100644
--- a/artiq-full/conda-channel.nix
+++ b/artiq-full/conda-channel.nix
@@ -2,7 +2,7 @@
 { jobs }:
 
 let 
-  condaBuilderEnv = import ../artiq-fast/conda/builder-env.nix { inherit pkgs; };
+  condaBuilderEnv = import (artiq-fast + "/conda/builder-env.nix") { inherit pkgs; };
 in
   pkgs.runCommand "conda-channel" { }
     ''