No longer able to build cargo-megadrive

[JomerDev]

It seems like it's no longer possible to build cargo-megadrive, as an inner dependency (once_cell) uses features that require a newer rust version (1.60).
I get the error namespaced features with the dep: prefix are only allowed on the nightly channel when running docker build -t rust-mega-drive:latest -f Dockerfile.megadrive .
(This command is btw also missing from the docs, but from what I can tell it is needed to make the next step work)

Edit: It works with using --locked on cargo install

[oschijns]

No its still doesn't work, I got the following error:

8.547    Compiling megadrive-graphics v0.1.0 (/rust-mega-drive/libs/megadrive-graphics)
8.789 error: couldn't read /rust-mega-drive/target/release/build/megadrive-graphics-a4b44804dd37a11d/out/default_ascii.rs: No such file or directory (os error 2)
8.789  --> libs/megadrive-graphics/src/lib.rs:8:5
8.789   |
8.789 8 |     include!(concat!(env!("OUT_DIR"), "/default_ascii.rs"));
8.789   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
8.789   |
8.789   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
8.789
8.789 error: aborting due to previous error
8.789
8.790 error: could not compile `megadrive-graphics`
8.790
8.790 To learn more, run the command again with --verbose.
8.790 warning: build failed, waiting for other jobs to finish...
10.97 error: build failed