$ apt-cache policy debootstrap debootstrap: Installed: 1.0.123ubuntu6
$ DEBOOTSTRAP_MIRROR=http://ubuntu.osuosl.org/ubuntu mk-sbuild --name impish-amd64 impish I: Target architecture can be executed I: Retrieving InRelease I: Checking Release signature I: Valid Release signature (key id F6ECB3762474EDA9D21B7022871920D1991BC93C)
$ apt-cache policy debootstrap
debootstrap:
Installed: 1.0.123ubuntu6
$ DEBOOTSTRAP_MIRROR=http:// ubuntu. osuosl. org/ubuntu mk-sbuild --name impish-amd64 impish 9D21B7022871920 D1991BC93C)
I: Target architecture can be executed
I: Retrieving InRelease
I: Checking Release signature
I: Valid Release signature (key id F6ECB3762474EDA