https://buildd.debian.org/status/fetch.php?pkg=uim&arch=ppc64el&ver=1%3A1.9.9-2&stamp=1793280701&raw=0
...
debian/rules override_dh_install
make[1]: Entering directory '/build/reproducible-path/uim-1.9.9'
install -d /build/reproducible-path/uim-1.9.9/debian/uim/var/lib/uim
cp /build/reproducible-path/uim-1.9.9/debian/README.var-lib-uim /build/reproducible-path/uim-1.9.9/debian/uim/var/lib/uim/README
install -d /build/reproducible-path/uim-1.9.9/debian/tmp/usr/share/uim/helperdata
cp /build/reproducible-path/uim-1.9.9/data/bushu.t \
/build/reproducible-path/uim-1.9.9/debian/tmp/usr/share/uim/helperdata
dh_install --sourcedir=debian/tmp
dh_install: warning: Cannot find (any matches for) "usr/bin/uim-mozc-helper" (tried in debian/tmp, debian/tmp)
dh_install: warning: uim-mozc missing files: usr/bin/uim-mozc-helper
dh_install: warning: Cannot find (any matches for) "usr/share/uim/mozc-custom.scm" (tried in debian/tmp, debian/tmp)
dh_install: warning: uim-mozc missing files: usr/share/uim/mozc-custom.scm
dh_install: warning: Cannot find (any matches for) "usr/share/uim/mozc-key-custom.scm" (tried in debian/tmp, debian/tmp)
dh_install: warning: uim-mozc missing files: usr/share/uim/mozc-key-custom.scm
dh_install: warning: Cannot find (any matches for) "usr/share/uim/mozc.scm" (tried in debian/tmp, debian/tmp)
dh_install: warning: uim-mozc missing files: usr/share/uim/mozc.scm
dh_install: error: missing files, aborting
make[1]: *** [debian/rules:94: override_dh_install] Error 255
MOZC_ARCHS in debian/rules differs from the architecture list of uim-mozc.