zfs: fix PATH for zpool.d scripts

pkgs/os-specific/linux/zfs/default.nix

@@ -7,6 +7,7 @@
 , libtirpc
 , nfs-utils
 , gawk, gnugrep, gnused, systemd
+, smartmontools, sysstat, sudo
 
 # Kernel dependencies
 , kernel ? null
@@ -131,6 +132,13 @@ let
         (cd $out/share/bash-completion/completions; ln -s zfs zpool)
       '';
 
+      postFixup = ''
+        path="PATH=${makeBinPath [ coreutils gawk gnused gnugrep utillinux smartmontools sysstat sudo ]}"
+        for i in $out/libexec/zfs/zpool.d/*; do
+          sed -i "2i$path" $i
+        done
+      '';
+
       outputs = [ "out" ] ++ optionals buildUser [ "lib" "dev" ];
 
       meta = {