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-rw-r--r--nixpkgs/pkgs/development/tools/parsing/flexc++/default.nix1
1 files changed, 1 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/tools/parsing/flexc++/default.nix b/nixpkgs/pkgs/development/tools/parsing/flexc++/default.nix
index e4db5631e7fe..1a56818b4d65 100644
--- a/nixpkgs/pkgs/development/tools/parsing/flexc++/default.nix
+++ b/nixpkgs/pkgs/development/tools/parsing/flexc++/default.nix
@@ -35,6 +35,7 @@ stdenv.mkDerivation rec {
 
   meta = with lib; {
     description = "C++ tool for generating lexical scanners";
+    mainProgram = "flexc++";
     longDescription = ''
       Flexc++ was designed after `flex'. Flexc++ offers a cleaner class design
       and requires simpler specification files than offered by flex's C++