drv-grepper.sh

#!/bin/bash

ALL_ATTRS_NIX=$(mktemp)
PKGS_PATH="."
#NIX_SYSTEM="x86_64-linux"

cat > "$ALL_ATTRS_NIX" <<EOF
{}@args: let pkgs = (import $(realpath "$PKGS_PATH") args); in with pkgs; builtins.filter (x: x != null) (builtins.map (x: if (builtins.tryEval x.drvPath).success then x else null) [
EOF

nix-env -f "$PKGS_PATH" ${NIX_SYSTEM:+--argstr system "$NIX_SYSTEM"} -qaP --no-name >> "$ALL_ATTRS_NIX"

echo '])' >>  "$ALL_ATTRS_NIX"

nix-instantiate "$ALL_ATTRS_NIX" ${NIX_SYSTEM:+--argstr system "$NIX_SYSTEM"} | cut -f1 -d '!' | sort | uniq | while read f ; do grep -El "$1" $f ; done