diff --git a/pkgs/tools/misc/man-db/default.nix b/pkgs/tools/misc/man-db/default.nix
index 4ac11aa62c1b..9c8adc1d8d41 100644
--- a/pkgs/tools/misc/man-db/default.nix
+++ b/pkgs/tools/misc/man-db/default.nix
@@ -77,5 +77,6 @@ stdenv.mkDerivation rec {
     description = "An implementation of the standard Unix documentation system accessed using the man command";
     license = licenses.gpl2;
     platforms = lib.platforms.unix;
+    mainProgram = "man";
   };
 }