rustup: rustup update nightly fails

On OS X:

> rustup --version
rustup 0.1.3
> rustup toolchain list
nightly
nightly-2016-03-26
nightly-2016-03-26-x86_64-apple-darwin
nightly-2016-04-02-x86_64-apple-darwin
nightly-x86_64-apple-darwin
stable
> rustup --verbose update nightly
verbose: read metadata version: '12'
verbose: updating existing install for 'nightly-x86_64-apple-darwin'
verbose: toolchain directory: '/Users/logic/.multirust/toolchains/nightly-x86_64-apple-darwin'
info: syncing channel updates for 'nightly-x86_64-apple-darwin'
verbose: creating temp file: /Users/logic/.multirust/tmp/umkvy9x4hmpu77ck_file
verbose: downloading file from: 'https://static.rust-lang.org/dist/channel-rust-nightly.toml.sha256'
verbose: deleted temp file: /Users/logic/.multirust/tmp/umkvy9x4hmpu77ck_file
verbose: creating temp file: /Users/logic/.multirust/tmp/uo7vqtorg5gcyg9f_file.toml
verbose: downloading file from: 'https://static.rust-lang.org/dist/channel-rust-nightly.toml'
verbose: checksum passed
verbose: deleted temp file: /Users/logic/.multirust/tmp/uo7vqtorg5gcyg9f_file.toml
error: manifest missing package for component rust-std-aarch64-unknown-linux-gnu
> rustup --verbose update nightly-2016-04-05                                                                                                                           
verbose: read metadata version: '12'
verbose: installing toolchain 'nightly-2016-04-05-x86_64-apple-darwin'
verbose: toolchain directory: '/Users/logic/.multirust/toolchains/nightly-2016-04-05-x86_64-apple-darwin'
info: syncing channel updates for 'nightly-2016-04-05-x86_64-apple-darwin'
verbose: creating temp file: /Users/logic/.multirust/tmp/cs6suxkfhg3s8fir_file
verbose: downloading file from: 'https://static.rust-lang.org/dist/2016-04-05/channel-rust-nightly.toml.sha256'
verbose: deleted temp file: /Users/logic/.multirust/tmp/cs6suxkfhg3s8fir_file
verbose: no update hash at: '/Users/logic/.multirust/update-hashes/nightly-2016-04-05-x86_64-apple-darwin'
verbose: creating temp file: /Users/logic/.multirust/tmp/v8c4gqhcjbck3e1w_file.toml
verbose: downloading file from: 'https://static.rust-lang.org/dist/2016-04-05/channel-rust-nightly.toml'
verbose: checksum passed
verbose: deleted temp file: /Users/logic/.multirust/tmp/v8c4gqhcjbck3e1w_file.toml
error: manifest missing package for component rust-std-aarch64-unknown-linux-gnu