1 files changed, 1 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/applications/science/molecular-dynamics/dl-poly-classic/default.nix b/nixpkgs/pkgs/applications/science/molecular-dynamics/dl-poly-classic/default.nix
index a13a071584fd..75ab576212d7 100644
--- a/nixpkgs/pkgs/applications/science/molecular-dynamics/dl-poly-classic/default.nix
+++ b/nixpkgs/pkgs/applications/science/molecular-dynamics/dl-poly-classic/default.nix
@@ -35,6 +35,7 @@ stdenv.mkDerivation {
   meta = with lib; {
     homepage = "https://www.ccp5.ac.uk/DL_POLY_C";
     description = "DL_POLY Classic is a general purpose molecular dynamics simulation package";
+    mainProgram = "DLPOLY.X";
     license = licenses.bsdOriginal;
     platforms = platforms.unix;
     maintainers = [ maintainers.costrouc ];