Noble (1.8.1-2): universe/gnu-r
Mantic (1.8.1-2): universe/gnu-r
Jammy (1.8.0-1): universe/gnu-r
Focal (1.7.6-1build1): universe/gnu-r
Bionic (1.7.4-1build1): universe/gnu-r
Xenial (1.7.4-1): universe/gnu-r
Trusty (1.7.1-2): universe/gnu-r