If you have already prepared the base VMs ([/build-base-vms.sh](../gitian-host/build-base-vms.sh)) inside the gitian host container, all what you need to do is:
[build-bitcoin.sh](build-bitcoin.sh) is a script that will download & build all the dependencies and then bitcoin itself, for both i386 and amd64 Linux architectures.
**NOTE:** the SendEnv= is there to overcome an [issue](https://github.com/devrandom/gitian-builder/issues/56) in gitian-builder that allows pollution of the LXC environment.
Before doing that, you can verify if signatures are matching with those of [other developers](https://github.com/bitcoin/gitian.sigs) by peeking inside *~/gitian.sigs* of the running container.
In order to sign you have to either put your private key in the container's *~/.gnupg* or perform the signing externally, at your option.
If you have the private key in the container (also displayed by `gpg -K`), then you can use the [sign.sh](sign.sh) script that is already in the running container, otherwise
run it (with failure) and then copy the *~/gitian.sigs~ directory to another machine to apply the GPG signature.
If everything went well, you can fork the [gitian sigs repo](https://github.com/bitcoin/gitian.sigs), commit your signatures and submit a pull request for inclusion.