а дальше
sudo make install
make[1]: Entering directory '/pg_repack-1.4.6/bin'
Makefile:34: /usr/lib/postgresql/12/lib/pgxs/src/makefiles/
pgxs.mk: No such file or directory
make[1]: *** No rule to make target '/usr/lib/postgresql/12/lib/pgxs/src/makefiles/
pgxs.mk'. Stop.
make[1]: Leaving directory '/home/srvmaster/pg_repack-1.4.6/bin'
make: *** [Makefile:35: install] Error 2