Build failing with nightly multirust

[jesuscript]

Ubuntu 14.04; "master" branch

     Running `rustc /root/.multirust/toolchains/nightly/cargo/registry/src/github.com-88ac128001ac3a9a/syntex-0.29.0/src/lib.rs --crate-name syntex --crate-type lib -C opt-level=3 -C metadata=65161ba37cf3f80a -C extra-filename=-65161ba37cf3f80a --out-dir /root/parity/target/release/deps --emit=dep-info,link -L dependency=/root/parity/target/release/deps -L dependency=/root/parity/target/release/deps --extern syntex_syntax=/root/parity/target/release/deps/libsyntex_syntax-3333bc9a4fdc80b9.rlib --cap-lints allow`
/root/.multirust/toolchains/nightly/cargo/git/checkouts/rust-ctrlc-270fba86ad6a961c/master/src/lib.rs:51:5: 51:15 error: attribute should be applied to struct or enum [E0517]
/root/.multirust/toolchains/nightly/cargo/git/checkouts/rust-ctrlc-270fba86ad6a961c/master/src/lib.rs:51     #[repr(C)]
                                                                                                             ^~~~~~~~~~
/root/.multirust/toolchains/nightly/cargo/git/checkouts/rust-ctrlc-270fba86ad6a961c/master/src/lib.rs:51:5: 51:15 help: run `rustc --explain E0517` to see a detailed explanation
error: aborting due to previous error
Build failed, waiting for other jobs to finish...
Could not compile `ctrlc`.

Caused by:
  Process didn't exit successfully: `rustc /root/.multirust/toolchains/nightly/cargo/git/checkouts/rust-ctrlc-270fba86ad6a961c/master/src/lib.rs --crate-name ctrlc --crate-type lib -C opt-level=3 --cfg feature="default" --cfg feature="lazy_static" --cfg feature="stable" -C metadata=39e3d2ab6959b27c -C extra-filename=-39e3d2ab6959b27c --out-dir /root/parity/target/release/deps --emit=dep-info,link -L dependency=/root/parity/target/release/deps -L dependency=/root/parity/target/release/deps --extern libc=/root/parity/target/release/deps/liblibc-c862fb1c783dd674.rlib --extern winapi=/root/parity/target/release/deps/libwinapi-96db160368c72f00.rlib --extern kernel32=/root/parity/target/release/deps/libkernel32-a6ecb7771eb9fd8d.rlib --extern lazy_static=/root/parity/target/release/deps/liblazy_static-007034d2ad8108ce.rlib --cap-lints allow` (exit code: 101)

[NikVolf]

We don't build on nightly anymore

[arkpar]

Oh but we want to :)

[NikVolf]

still failing anyway
https://travis-ci.org/ethcore/parity/jobs/111165561