diff --git a/lmxg-mu50 b/lmxg-mu50
index 4e0a28d..e96d223 100644
--- a/lmxg-mu50
+++ b/lmxg-mu50
@@ -1,8 +1,9 @@
 #!/usr/bin/env bash
 
+PATH=$PATH:@MAME_BIN_DIR@
 PACKAGE_DIR="@DIR@/share/mame/assets/mu50"
 WORKDIR="$XDG_DATA_HOME/lmxg-mu50"
-MAME_BIN=`which mame`
+MAME_BIN=mame
 MIDI_PORT="Midi Through Port-0"
 
 mkdir -p  $WORKDIR && cd $WORKDIR
diff --git a/package.nix b/package.nix
index 81dd328..be611d6 100644
--- a/package.nix
+++ b/package.nix
@@ -4,7 +4,6 @@
 
   # dependencies
   mame,
-  which,
   p7zip,
   ...
 }:
@@ -28,7 +27,6 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     mame
-    which
   ];
 
   phases = [
@@ -45,13 +43,13 @@ stdenv.mkDerivation rec {
 
   installPhase = ''
     mkdir -p $out/bin
-    cat ${bin} | sed "s|@DIR@|$out|" > $out/bin/${pname}
+    cat ${bin} | sed "s|@DIR@|$out|" | sed "s|@MAME_BIN_DIR@|${mame}/bin|" > $out/bin/${pname}
     chmod +x $out/bin/${pname}
     mkdir -p $out/share/applications
     cat ${desktop} | sed "s|@EXEC@|$out/bin/${pname}|" > $out/share/applications/${pname}.desktop
     mkdir -p $out/share/pixmaps
     cp ${icon} $out/share/pixmaps/${pname}.png
-
+ 
     mkdir -p $out/share/mame/assets/mu50
 
     cp -r /build/mu50 $out/share/mame/assets/