1 files changed, 1 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/libraries/java/jflex/default.nix b/nixpkgs/pkgs/development/libraries/java/jflex/default.nix
index 90e4d4329d5e..3a55febff294 100644
--- a/nixpkgs/pkgs/development/libraries/java/jflex/default.nix
+++ b/nixpkgs/pkgs/development/libraries/java/jflex/default.nix
@@ -32,6 +32,7 @@ stdenv.mkDerivation rec {
   meta = {
     homepage = "https://www.jflex.de/";
     description = "Lexical analyzer generator for Java, written in Java";
+    mainProgram = "jflex";
     license = lib.licenses.bsd3;
     platforms = lib.platforms.unix;
   };