Revert "Merge branch 'modprobe-fix' of git://github.com/abbradar/nixpkgs"

Was meant to go into staging, sorry

This reverts commit 57b2d1e9b0, reversing
changes made to 760b2b9048.

nixos/modules/system/boot/kernel.nix

@@ -228,6 +228,7 @@ in
     systemd.services."systemd-modules-load" =
       { wantedBy = [ "multi-user.target" ];
         restartTriggers = [ kernelModulesConf ];
+        environment.MODULE_DIR = "/run/booted-system/kernel-modules/lib/modules";
         serviceConfig =
           { # Ignore failed module loads.  Typically some of the
             # modules in ‘boot.kernelModules’ are "nice to have but
@@ -237,6 +238,10 @@ in
           };
       };
 
+    systemd.services.kmod-static-nodes =
+      { environment.MODULE_DIR = "/run/booted-system/kernel-modules/lib/modules";
+      };
+
     lib.kernelConfig = {
       isYes = option: {
         assertion = config: config.isYes option;