./configure + endless loop

Am trying to build/install LFTP in Centos 7 and can’t get past an endless loop at ./configure stage. Steps I’ve taken:

% wget http://lftp.yar.ru/ftp/lftp-4.8.3.tar.gz
% tar xzf lftp-4.8.3.tar.gz
% cd lftp-4.8.3
% ./configure 

Then I see an endless loop of:

Enter y or n, or enter q to quit:

Enter y or n, or enter q to quit:

Enter y or n, or enter q to quit:

Any suggestions/tips appreciated.

I’ve tried to use a prefix with ./configure too but that doesn’t help.

./configure --prefix=/home/admin/lftp

Answer

As discussed in the comments, the following suggestion helped OP figure out the problem:

env -i ./configure