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-rw-r--r--nixpkgs/pkgs/tools/text/dirdiff/default.nix1
1 files changed, 1 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/tools/text/dirdiff/default.nix b/nixpkgs/pkgs/tools/text/dirdiff/default.nix
index 437743e66ef6..c0347aface09 100644
--- a/nixpkgs/pkgs/tools/text/dirdiff/default.nix
+++ b/nixpkgs/pkgs/tools/text/dirdiff/default.nix
@@ -52,6 +52,7 @@ stdenv.mkDerivation rec {
 
   meta = with lib; {
     description = "Graphical directory tree diff and merge tool";
+    mainProgram = "dirdiff";
     longDescription = ''
       Dirdiff is a graphical tool for displaying the differences between
       directory trees and for merging changes from one tree into another.