compat: mingw: simplify poor-mans-nix-shell.sh
compat: mingw: simplify poor-mans-nix-shell.sh

urbit/urbit,ngzax/urbit,ngzax/urbit,urbit/urbit,ngzax/urbit,ngzax/urbit,urbit/urbit,ngzax/urbit,urbit/urbit,ngzax/urbit,urbit/urbit,ngzax/urbit,urbit/urbit,urbit/urbit