1 files changed, 1 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/applications/science/logic/prooftree/default.nix b/nixpkgs/pkgs/applications/science/logic/prooftree/default.nix
index 4e65c018d1a2..adb64f02c14f 100644
--- a/nixpkgs/pkgs/applications/science/logic/prooftree/default.nix
+++ b/nixpkgs/pkgs/applications/science/logic/prooftree/default.nix
@@ -19,6 +19,7 @@ stdenv.mkDerivation rec {
 
   meta = with lib; {
     description = "A program for proof-tree visualization";
+    mainProgram = "prooftree";
     longDescription = ''
       Prooftree is a program for proof-tree visualization during interactive
       proof development in a theorem prover. It is currently being developed