$ cargo install xargo Updating registry `https://github.com/rust-lang/crates.io-index` Installing xargo v0.3.12 Compiling num-traits v0.2.5 Compiling rustc-demangle v0.1.9 Compiling cfg-if v0.1.5 Compiling xargo v0.3.12 Compiling semver v0.1.20 Compiling itoa v0.1.1 Compiling rand v0.4.2 Compiling same-file v0.1.3 Compiling serde v0.8.23 error[E0463]: can't find crate for `std` | = note: the `thumbv7m-none-eabi` 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 `itoa`. warning: build failed, waiting for other jobs to finish... error[E0463]: can't find crate for `std` | = note: the `thumbv7m-none-eabi` 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 `semver`. warning: build failed, waiting for other jobs to finish... error[E0463]: can't find crate for `std` | = note: the `thumbv7m-none-eabi` 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 `same-file`. warning: build failed, waiting for other jobs to finish... error[E0463]: can't find crate for `std` | = note: the `thumbv7m-none-eabi` 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 `rand`. warning: build failed, waiting for other jobs to finish... error[E0463]: can't find crate for `std` | = note: the `thumbv7m-none-eabi` 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`. warning: build failed, waiting for other jobs to finish... error: failed to compile `xargo v0.3.12`, intermediate artifacts can be found at `/tmp/cargo-install8AbK0H` Caused by: build failed $ rustup show Default host: x86_64-unknown-linux-gnu installed toolchains -------------------- stable-x86_64-unknown-linux-gnu (default) nightly-x86_64-unknown-linux-gnu installed targets for active toolchain -------------------------------------- thumbv7m-none-eabi x86_64-unknown-linux-gnu active toolchain ---------------- stable-x86_64-unknown-linux-gnu (default) rustc 1.28.0 (9634041f0 2018-07-30)