guix/build-system/perl.scm \
guix/build-system/python.scm \
guix/build-system/ocaml.scm \
+ guix/build-system/qt.scm \
guix/build-system/waf.scm \
guix/build-system/r.scm \
guix/build-system/rakudo.scm \
guix/build/perl-build-system.scm \
guix/build/python-build-system.scm \
guix/build/ocaml-build-system.scm \
+ guix/build/qt-build-system.scm \
guix/build/r-build-system.scm \
guix/build/rakudo-build-system.scm \
guix/build/ruby-build-system.scm \