Cannot compile on nightly with no_std

[MathiasKoch]

Trying to compile on nightlies with default-features = false, in a no-std project, results in

error[E0463]: can't find crate for `std`
  |
  = note: the `thumbv7em-none-eabihf` target may not be installed

error: aborting due to previous error

For more information about this error, try `rustc --explain E0463`.
error: could not compile `serde`.

Not sure how long back this is an issue.

[Michael-F-Bryan]

I don't think this is related to serde. Have a look at rust-embedded/cortex-m-quickstart#58, you're probably missing a #![no_std] annotation at the top of your lib.rs.

[MathiasKoch]

Nope.. It has #![no_std] and works great with a large number of other no_std crates.

Only change it takes to make it fail building is
serde = { version = "1.0.104", default-features = false }
in my Cargo.toml

[MathiasKoch]

Update:
Figured out what went wrong.

This issue describes perfectly what was happening rust-lang/cargo#5730

The issue is that i was having build-dependencies using std lib.