Error running ./configure

[hectoralos]

I can't install this (or any other) Apertium package after I git-clone them in my computer. I always have the same issue:

./configure 
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
./configure: line 2323: syntax error near unexpected token `APERTIUM,'
./configure: line 2323: `PKG_CHECK_MODULES(APERTIUM, apertium >= 3.6.0)'

I'm working on Ubuntu 20.04.1 LTS.

I have my system updated and upgraded to the last versions.

I guess, the problem has arisen after I upgrade the system to version 20, but I didn't notice it until I had to compile from scratch a packet.

Any help will be really appreciated because it is right now a blocking issue which prevents me from closing new versions of several packages.

[ftyers]

The problem was multiple versions of automake/aclocal in /usr/local/bin.