tvl-depot/tools/eprintf.nix

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{ depot, pkgs, ... }:
let
bins = depot.nix.getBins pkgs.coreutils [ "printf" ];
# printf(1), but redirect to stderr
in
depot.nix.writeExecline "eprintf" { } [
"fdmove"
"-c"
"1"
"2"
bins.printf
"$@"
]