modprobe service: drop kmod wrapper

nixos/modules/system/boot/modprobe.nix

@@ -8,41 +8,6 @@ with lib;
 
   options = {
 
-    system.sbin.modprobe = mkOption {
-      internal = true;
-      default = pkgs.stdenv.mkDerivation {
-        name = "modprobe";
-        buildCommand = ''
-          mkdir -p $out/bin
-          for i in ${pkgs.kmod}/sbin/*; do
-            name=$(basename $i)
-            echo "$text" > $out/bin/$name
-            echo 'exec '$i' "$@"' >> $out/bin/$name
-            chmod +x $out/bin/$name
-          done
-          ln -s bin $out/sbin
-        '';
-        text =
-          ''
-            #! ${pkgs.stdenv.shell}
-            export MODULE_DIR=/run/current-system/kernel-modules/lib/modules
-
-            # Fall back to the kernel modules used at boot time if the
-            # modules in the current configuration don't match the
-            # running kernel.
-            if [ ! -d "$MODULE_DIR/$(${pkgs.coreutils}/bin/uname -r)" ]; then
-                MODULE_DIR=/run/booted-system/kernel-modules/lib/modules/
-            fi
-
-          '';
-        meta.priority = 4;
-      };
-      description = ''
-        Wrapper around modprobe that sets the path to the modules
-        tree.
-      '';
-    };
-
     boot.blacklistedKernelModules = mkOption {
       type = types.listOf types.str;
       default = [];
@@ -87,7 +52,7 @@ with lib;
       '';
     environment.etc."modprobe.d/debian.conf".source = pkgs.kmod-debian-aliases;
 
-    environment.systemPackages = [ config.system.sbin.modprobe pkgs.kmod ];
+    environment.systemPackages = [ pkgs.kmod ];
 
     system.activationScripts.modprobe =
       ''
@@ -95,7 +60,7 @@ with lib;
         # in the right location in the Nix store for kernel modules).
         # We need this when the kernel (or some module) auto-loads a
         # module.
-        echo ${config.system.sbin.modprobe}/sbin/modprobe > /proc/sys/kernel/modprobe
+        echo ${pkgs.kmod}/bin/modprobe > /proc/sys/kernel/modprobe
       '';
 
     environment.sessionVariables.MODULE_DIR = "/run/current-system/kernel-modules/lib/modules";