Install error

[Danny Horne]

Hi all,

I'm trying to install from sources on Fedora 28.  I used Mercurial to
download them (if that's important).

configure, configure perl and configure php went well, as did make all.

I get the following error when trying make install

[root at hawking unit]# make install
install -d sbin
install -p build/unitd sbin/
install -d build
install -d build
install -p build/perl.unit.so \
        build/
install: 'build/perl.unit.so' and 'build/perl.unit.so' are the same file
make: *** [build/Makefile:1466: perl-install] Error 1

Thanks for looking