This will enable nixpkgs -- and any other distribution that builds in a
network sandbox and/or wants to use their own corrosion package rather
than building another one -- to do so without patching taskwarrior.
Since we're already using submodules for libshared I don't think this
should make the build process any more complicated for anyone else.
See
https://github.com/NixOS/nixpkgs/issues/300679#issuecomment-2041252688
for context.