Scripts/build.py | 4 2 + 2 - 0 !
Scripts/fontbuilder.py | 8 3 + 5 - 0 !
2 files changed, 5 insertions(+), 7 deletions(-)

 use python3

Makefile | 2 1 + 1 - 0 !
1 file changed, 1 insertion(+), 1 deletion(-)

 only execute target generating font files.

Makefile | 4 2 + 2 - 0 !
1 file changed, 2 insertions(+), 2 deletions(-)

 makefile: allow file overwrite in make install

The original code is fragile and would raise error if the font file
is already present in the target dir. Allow force file overwrite for
post-build installation.

This solves double-build bugs such as https://bugs.debian.org/1044523 .

Also allow failures when invoking fc-cache. It is meaningless to force
refreshing fontconfig in a temporary building chroot environment.