diff --git a/pkgs/applications/version-management/redmine/default.nix b/pkgs/applications/version-management/redmine/default.nix
index defbf9c2aec4..4279fdd5f995 100644
--- a/pkgs/applications/version-management/redmine/default.nix
+++ b/pkgs/applications/version-management/redmine/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, bundlerEnv, ruby }:
+{ stdenv, fetchurl, bundlerEnv, ruby, makeWrapper }:
 
 let
   version = "4.1.1";
@@ -19,6 +19,7 @@ in
       sha256 = "1nndy5hz8zvfglxf1f3bsb1pkrfwinfxzkdan1vjs3rkckkszyh5";
     };
 
+    nativeBuildInputs = [ makeWrapper ];
     buildInputs = [ rubyEnv rubyEnv.wrappedRuby rubyEnv.bundler ];
 
     # taken from https://www.redmine.org/issues/33784
@@ -31,12 +32,14 @@ in
     '';
 
     installPhase = ''
-      mkdir -p $out/share
+      mkdir -p $out/bin $out/share
       cp -r . $out/share/redmine
       for i in config files log plugins public/plugin_assets public/themes tmp; do
         rm -rf $out/share/redmine/$i
         ln -fs /run/redmine/$i $out/share/redmine/$i
       done
+
+      makeWrapper ${rubyEnv.wrappedRuby}/bin/ruby $out/bin/rdm-mailhandler.rb --add-flags $out/share/redmine/extra/mail_handler/rdm-mailhandler.rb
     '';
 
     meta = with stdenv.lib; {