nixpacks cargo workspaces problem

[gwbischof]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

nixpack build .

gives the following error:
Error: This manifest requires workspace inheritance, but `inherit_workspace` hasn't been called yet

when using:

[dependencies]
http = { workspace = true }

like described in this doc:
https://doc.rust-lang.org/cargo/reference/workspaces.html#the-dependencies-table

To reproduce

Use the code from this PR:
#992

cd nixpacks/examples/rust-cargo-workspaces
nixpacks build .

Expected behavior

build successful

Environment

NAME="Linux Mint"
VERSION="21.2 (Victoria)"

nixpacks --version
nixpacks 1.17.0

[gwbischof]

I see that nixpacks rust is pinned to 1.60, I think Rust > 1.64 might fix this.
https://github.com/rust-lang/rust/blob/master/RELEASES.md#cargo-8