diff --git a/Test.hs b/Test.hs
index 7503916..64581c5 100755
--- a/Test.hs
+++ b/Test.hs
@@ -22,7 +22,7 @@ processOutput p args = Text.strip . Text.pack <$> readCreateProcess ((proc (Text
 -- * OpenGL
 
 -- | Returns the path to the nixGLXXX binary.
-getNixGLBin version = (<>("/bin/"<>version)) <$> processOutput "nix-build" ["./", "-A", version, "--arg", "pkgs", "import (fetchTarball " <> currentChannel <> ")"]
+getNixGLBin version = (<>("/bin/"<>version)) <$> processOutput "nix-build" ["./", "-A", version, "-I", "nixpkgs=" <> currentChannel]
 
 -- | Returns the vendor string associated with a glxinfo wrapped by a nixGL.
 getVendorString io = do