silly uki image with the systemd-ukify tooling

flake.nix

@@ -15,11 +15,49 @@
     flake-utils.lib.eachDefaultSystem (
       system:
       let
-        pkgs = import nixpkgs { inherit system; };
+        pkgs = import nixpkgs {
+          inherit system;
+        };
       in
       {
         packages = {
           default = self.packages.${system}.image;
+
+          glibc = pkgs.stdenv.mkDerivation {
+            src = pkgs.fetchurl {
+              url = "mirror://gnu/glibc/glibc-2.40.tar.xz";
+              sha256 = "sha256-GaiQF16SY9dI9ieZPeb0sa+c0h4D8IDkv7Oh+sECBaI=";
+            };
+            name = "glibcStandalone";
+            enableParallelBuilding = true;
+            configureFlags = [
+              "--prefix=/"
+              "--libdir=/lib"
+              "--bindir=/bin"
+              "--sysconfdir=/etc"
+            ];
+            preConfigure =
+              ''
+                export PWD_P=$(type -tP pwd)
+                for i in configure io/ftwtest-sh; do
+                    sed -i "$i" -e "s^/bin/pwd^$PWD_P^g"
+                done
+
+                mkdir ../build
+                cd ../build
+
+                configureScript="`pwd`/../$sourceRoot/configure"
+              '';
+            nativeBuildInputs = [ pkgs.bison pkgs.python3Minimal];
+
+            outputs = [
+              "out"
+            ];
+            preInstall = ''
+              export DESTDIR=${placeholder "out"}
+            '';
+          };
+
           image = pkgs.writeShellScriptBin "image" ''
             echo "make UKI..."
             echo ${self.packages.${system}.kernel.kernel}/bzImage
@@ -115,9 +153,11 @@
             find . -type f -executable | xargs ldd | awk '{print $3}' | grep -v systemd | sort -u | xargs cp -t usr/lib
             find . -type f -executable | xargs chmod 755
 
-            # hacky patch elf
-            find . -type f -executable -print | xargs -I {} ${pkgs.lib.getExe pkgs.patchelf} --set-rpath /lib:/lib64 {} 2> /dev/null
+            # FIXME: hacky patch elf patching. Is there a better way????????
+            find . -type f -executable -print | xargs -I {} ${pkgs.lib.getExe pkgs.patchelf} --set-rpath /lib {} 2> /dev/null
             find . -type f -executable -print | xargs -I {} ${pkgs.lib.getExe pkgs.patchelf} --set-interpreter /lib/ld-linux-x86-64.so.2 {} 2> /dev/null
+            cp ${self.packages.${system}.glibc.out}/lib/ld-linux-x86-64.so.2 lib/
+            ${pkgs.lib.getExe pkgs.patchelf} --remove-rpath lib/ld-linux-x86-64.so.2
 
             # gen initrd
             find . -print0 | ${pkgs.lib.getExe pkgs.cpio} --null --owner=root:root -o --format=newc | ${pkgs.lib.getExe pkgs.gzip} -9 > ../initrd.gz