menu.ui is missing. It has not been added into the repository yet, although it has been a build target since Commit 24c534d [1]. That causes the following build error:

$ jhbuild make
*** Building five-or-more *** [1/1]
make -j 5
make  all-recursive
make[1]: Entering directory `/opt/gnome/checkout/five-or-more'
Making all in data
make[2]: Entering directory `/opt/gnome/checkout/five-or-more/data'
Making all in icons
make[3]: Entering directory `/opt/gnome/checkout/five-or-more/data/icons'
make[3]: Nothing to be done for `all'.
make[3]: Leaving directory `/opt/gnome/checkout/five-or-more/data/icons'
make[3]: Entering directory `/opt/gnome/checkout/five-or-more/data'
make[3]: *** No rule to make target `menu.ui', needed by `all-am'.  Stop.
make[3]: Leaving directory `/opt/gnome/checkout/five-or-more/data'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/opt/gnome/checkout/five-or-more/data'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/opt/gnome/checkout/five-or-more'
make: *** [all] Error 2


[1] https://git.gnome.org/browse/five-or-more/commit/?id=24c534d3a8b1ab068dd510a6b1cbec75cf3fb325