diff --git a/flake.nix b/flake.nix
index 474bd36..7803b16 100644
--- a/flake.nix
+++ b/flake.nix
@@ -82,7 +82,9 @@
           '';
 
           configureFlags = [
-            "KERNELDIR=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
+            #"prefix=${placeholder "out"}"
+            #"bindir=${placeholder "out"}/bin"
+            #"KERNELDIR=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
             #"--with-linux-dir=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
             #"LOCALEDIR=${placeholder "out"}"
             "--with-realtime=uspace"
@@ -95,13 +97,34 @@
             #"PYTHON_LDFLAGS=-L${pkgs.python39Packages.python}/lib"
           ];
 
+          makeFlags = [
+            #"prefix=${placeholder "out"}"
+            #"prefix="
+            "EMC2_RTLIB_DIR=/lib/linuxcnc/modules"
+            "SITEPY=/lib/python"
+            "bindir=/bin"
+            "libdir=/lib"
+            "sysconfdir=/etc"
+            "moduledir=/lib/linuxcnc/modules"
+            "docsdir=/share/doc"
+            "mandir=/share/man"
+            "includedir=/include"
+            # TODO find out what is in ncfiles
+            #"ncfilesdir=/NC"
+            "ncfilesdir=/share"
+            "tcldir=/lib/tcltk"
+            "localedir=/locale"
+            "datadir=/share"
+          ];
+
           preInstall = ''
             substituteInPlace Makefile --replace 'chown' '#chown'
           '';
 
           installFlags = [
+            #"bindir=/bin"
             "INSTALL=install"
-            #"DESTDIR=${placeholder "out"}"
+            "DESTDIR=${placeholder "out"}"
             "SETUID=install"
           ];
 
@@ -110,11 +133,11 @@
             pkg-config
             #wrapGAppsHook
             gobject-introspection
+            makeWrapper
           ];
           #nativeBuildInputs = [ pkgs.pkg-config ];
-          postInstall = ''
-            ls $out/bin
-            substituteInPlace $out/bin/linuxcnc --replace 'wish' '${pkgs.tk}/bin/wish'
+          postBuild = ''
+            substituteInPlace ../scripts/linuxcnc --replace 'wish' '${pkgs.tk}/bin/wish'
           '';
           buildInputs = with pkgs; [
             (python3.withPackages