1 files changed, 1 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/python-modules/unidiff/default.nix b/nixpkgs/pkgs/development/python-modules/unidiff/default.nix
index 3dd206d509f5..a0c1f24a5c56 100644
--- a/nixpkgs/pkgs/development/python-modules/unidiff/default.nix
+++ b/nixpkgs/pkgs/development/python-modules/unidiff/default.nix
@@ -18,6 +18,7 @@ buildPythonPackage rec {
 
   meta = with lib; {
     description = "Unified diff python parsing/metadata extraction library";
+    mainProgram = "unidiff";
     homepage = "https://github.com/matiasb/python-unidiff";
     changelog = "https://github.com/matiasb/python-unidiff/raw/v${version}/HISTORY";
     license = licenses.mit;