If the first install fails (e.g. when the build fails, see separate bug report on MATE install), it is possible to retry the installation. However, on the second attempt the installer crashes when selecting a keyboard layout.
A backtrace is displayed; the important part appears to be this: In ./gnu/installer/steps.scm: 177:21 10 (_) In ice-9/eval.scm: 619:8 9 (_ #(#(#(#<directory (guile-user) 2525140>) #<<ins… In ./gnu/installer/keymap.scm: 163:7 8 (_ _) In unknown file: 7 (scm-error misc-error #f "~A" ("Unable to locate ke In ice-9/boot-9.scm: 751:25 6 (dispatch-exception 4 misc-error (#f "~A" ("Unable In ice-9/eval.scm 619:8 5 (_ #(#(#<directory (guile-user) 2525140> #<<instal… [some not important stuff I am too lazy to type…] ice-9/eval.scm:159:9: Unable to locate keymap update file