How to fix `fatal error: /386/include/u.h:`?

I try to install Inferno on my Debian 10. $ git clone https://github.com/doublec/inferno $ cd inferno $ sh Mkdirs $ nano mkconfig ROOT=/root/of/the/inferno/git/clone SYSHOST=Linux OBJTYPE=386 $ export PATH=$PATH:pwd/Linux/386/bin $ ./makemk.sh > removing old libraries and binaries gcc -m32 -c -I/home/user1/inferno/Plan9/386/include -I/home/user1/inferno/include -I/home/user1/inferno/utils/include regaux.c regcomp.c regerror.c regexec.c regsub.c rregexec.c rregsub.c After last operation I got it output Everything lib.c with fatal error: >...**fatal error: /386/include/u.h**...