Android Termux build fails because of arboard dependency

[olegbilovus]

I tried to install stu with cargo install --locked stu but it fails to build. The arboard dependency seems to be known as problematic for Android Termux builds. vladbat00/bevy_egui#241

error[E0433]: failed to resolve: could not find `Clipboard` in `platform`
  --> /data/data/com.termux/files/home/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/arboard-3.6.1/src/lib.rs:82:38
   |
82 |         Ok(Clipboard { platform: platform::Clipboard::new()? })
   |                                            ^^^^^^^^^ could not find `Clipboard` in `platform`

error[E0433]: failed to resolve: could not find `Clear` in `platform`
   --> /data/data/com.termux/files/home/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/arboard-3.6.1/src/lib.rs:162:31
    |
162 | ...rm::Clear::new(&mut self.platform) }
    |        ^^^^^ could not find `Clear` in `platform`

error[E0433]: failed to resolve: could not find `Get` in `platform`
   --> /data/data/com.termux/files/home/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/arboard-3.6.1/src/lib.rs:167:29
    |
167 | ...form::Get::new(&mut self.platform) }
    |          ^^^ could not find `Get` in `platform`

error[E0433]: failed to resolve: could not find `Set` in `platform`
   --> /data/data/com.termux/files/home/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/arboard-3.6.1/src/lib.rs:172:29
    |
172 | ...form::Set::new(&mut self.platform) }
    |          ^^^ could not find `Set` in `platform`

error[E0425]: cannot find type `Clipboard` in module `platform`
  --> /data/data/com.termux/files/home/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/arboard-3.6.1/src/lib.rs:71:33
   |
71 |     pub(crate) platform: platform::Clipboard,
   |                                    ^^^^^^^^^ not found in `platform`

error[E0425]: cannot find type `Get` in module `platform`
   --> /data/data/com.termux/files/home/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/arboard-3.6.1/src/lib.rs:179:33
    |
179 |     pub(crate) platform: platform::Get<'clipboard>,
    |                                    ^^^ not found in `platform`

error[E0425]: cannot find type `Set` in module `platform`
   --> /data/data/com.termux/files/home/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/arboard-3.6.1/src/lib.rs:213:33
    |
213 |     pub(crate) platform: platform::Set<'clipboard>,
    |                                    ^^^ not found in `platform`

error[E0425]: cannot find type `Clear` in module `platform`
   --> /data/data/com.termux/files/home/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/arboard-3.6.1/src/lib.rs:259:33
    |
259 |     pub(crate) platform: platform::Clear<'clipboard>,
    |                                    ^^^^^ not found in `platform`

Some errors have detailed explanations: E0425, E0433.
For more information about an error, try `rustc --explain E0425`.
error: could not compile `arboard` (lib) due to 8 previous errors
warning: build failed, waiting for other jobs to finish...
error: failed to compile `stu v0.7.6`, intermediate artifacts can be found at `/data/data/com.termux/files/usr/tmp/cargo-installLUSRq5`.
To reuse those artifacts with a future compilation, set the environment variable `CARGO_TARGET_DIR` to that path.

[lusingander]

It seems like a good approach to allow customization of the copy command, similar to this fix, and then separate builds based on the target.