diff --git a/pkgs/development/python-modules/av/default.nix b/pkgs/development/python-modules/av/default.nix
index d980d073c9df..7a6da605e338 100644
--- a/pkgs/development/python-modules/av/default.nix
+++ b/pkgs/development/python-modules/av/default.nix
@@ -44,12 +44,6 @@ buildPythonPackage rec {
 
   buildInputs = [ ffmpeg-headless ];
 
-  env = {
-    # If not, setup.py fails with:
-    # ValueError: You are not using a virtual environment
-    GITHUB_ACTIONS = "true";
-  };
-
   preCheck =
     let
       # Update with `./update-test-samples.bash` if necessary.