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{ stdenv, lib, writeScript, coreutils }:

with lib;

let escape = x: if builtins.typeOf x == "string" then escapeShellArg x else x;

in { ppn, mem, walltime, partition ? null, slurmFlags ? null
, salloc ? "/usr/bin/salloc", srun ? "/usr/bin/srun" }:
drv:
let ppnReified = if drv.multicore then ppn else 1;
in overrideDerivation drv ({ args, builder, name, ... }: {
  builder = stdenv.shell;
  args = let
    slurm = writeScript "slurm" ''
      #!${stdenv.shell}
      NIX_BUILD_CORES=${toString ppnReified}

      ${salloc} -c $NIX_BUILD_CORES --mem=${toString mem}G -t ${walltime} \
        -J "${name}" \
        ${optionalString (partition != null) "-p ${partition}"} \
        ${optionalString (slurmFlags != null) slurmFlags} \
        ${srun} ${builder} ${concatMapStringsSep " " escape args}
    '';

  in [ "-c" slurm ];
})