concurrent cargo with newly created registry

gistfile1.txt

cd gen/discovery1-cli && cargo build
    Updating registry `https://github.com/rust-lang/crates.io-index`
    Updating registry `https://github.com/rust-lang/crates.io-index`
 Downloading unicase v0.1.0
 Downloading libc v0.1.8
 Downloading gcc v0.3.8
 Downloading solicit v0.3.0
 Downloading log v0.3.1
 Downloading bitflags v0.3.0
   Verifying bitflags v0.3.0
 Downloading matches v0.1.2
 Downloading httparse v0.1.4
 Downloading chrono v0.2.14
 Downloading url v0.2.35
 Downloading cookie v0.1.21
 Downloading term v0.2.9
 Downloading traitobject v0.0.1
 Downloading unicode-xid v0.0.1
 Downloading num_cpus v0.2.6
 Downloading aster v0.3.2
 Downloading syntex_syntax v0.7.0
 Downloading rustc-serialize v0.3.15
 Downloading serde_codegen v0.4.2
 Downloading language-tags v0.0.7
 Downloading yup-oauth2 v0.5.0
 Downloading lazy_static v0.1.11
 Downloading itertools v0.3.20
 Downloading pkg-config v0.3.5
 Downloading mime v0.0.12
 Downloading clap v0.11.0
 Downloading strsim v0.4.0
 Downloading rand v0.3.8
 Downloading yup-hyper-mock v1.3.0
 Downloading quasi_codegen v0.3.1
 Downloading openssl v0.6.3
 Downloading num v0.1.25
 Downloading hpack v0.2.0
 Downloading time v0.1.26
 Downloading openssl-sys v0.6.3
 Downloading quasi v0.3.1
 Downloading ansi_term v0.6.2
   Verifying quasi v0.3.1
 Downloading bitflags v0.2.1
 Downloading typeable v0.1.2
   Verifying typeable v0.1.2
 Downloading serde v0.4.2
 Downloading syntex v0.7.0