Compiling on debian

Hello,

I'm trying to build redox_users on debian. Can I fix this somehow?

   Compiling redox_syscall v0.1.56
     Running `CARGO_PKG_VERSION=0.1.56 CARGO_PKG_REPOSITORY='https://gitlab.redox-os.org/redox-os/syscall' CARGO=/usr/bin/cargo CARGO_PKG_VERSION_PRE= CARGO_PKG_AUTHORS='Jeremy Soller <jackpot51@gmail.com>' CARGO_PKG_VERSION_MINOR=1 CARGO_PKG_NAME=redox_syscall CARGO_MANIFEST_DIR=/<<PKGBUILDDIR>>/debian/cargo_registry/redox_syscall-0.1.56 LD_LIBRARY_PATH='/<<PKGBUILDDIR>>/target/debug/deps:/usr/lib' CARGO_PKG_HOMEPAGE= CARGO_PKG_VERSION_PATCH=56 CARGO_PKG_DESCRIPTION='A Rust library to access raw Redox system calls' CARGO_PKG_VERSION_MAJOR=0 rustc --crate-name syscall /<<PKGBUILDDIR>>/debian/cargo_registry/redox_syscall-0.1.56/src/lib.rs --color never --crate-type lib --emit=dep-info,link -C debuginfo=2 -C metadata=c20a21f895147fe7 -C extra-filename=-c20a21f895147fe7 --out-dir /<<PKGBUILDDIR>>/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/<<PKGBUILDDIR>>/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/<<PKGBUILDDIR>>/target/debug/deps --cap-lints warn -C debuginfo=2 --cap-lints warn -C linker=x86_64-linux-gnu-gcc -C link-arg=-Wl,-z,relro --remap-path-prefix /<<PKGBUILDDIR>>=/usr/share/cargo/registry/redox-users-0.3.0`
error[E0554]: #![feature] may not be used on the stable release channel
 --> /usr/share/cargo/registry/redox-users-0.3.0/debian/cargo_registry/redox_syscall-0.1.56/src/lib.rs:1:1
  |
1 | #![feature(asm)]
  | ^^^^^^^^^^^^^^^^

error[E0554]: #![feature] may not be used on the stable release channel
 --> /usr/share/cargo/registry/redox-users-0.3.0/debian/cargo_registry/redox_syscall-0.1.56/src/lib.rs:2:1
  |
2 | #![feature(const_fn)]
  | ^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0554`.
error: Could not compile `redox_syscall`.