When I try to start nginx with embedded perl I get the error "Can't locate nginx.pm in @INC"

@INC includes the folder I specified using --with-perl_modules_path, but doesn't include the arch-name subfolder (i386-linux-thread-multi), which is where the nginx.pm module was installed to.

This is my configure:
./configure --prefix=$HOME/apps/$NGINX \
--with-pcre=$HOME/tarballs/$PCRE \
--without-http_autoindex_module \
--without-http_charset_module \
--without-http_empty_gif_module \
--without-http_ssi_module \
--with-http_gzip_static_module \
--with-http_realip_module \
--with-http_geoip_module \
--with-http_ssl_module --with-openssl=../$OPENSSL \
--with-http_perl_module --with-perl_modules_path=perl/lib \
--with-cc-opt="-I$HOME/apps/GeoIP/include" --with-ld-opt="-Wl,-R,$HOME/apps/GeoIP/lib -L$HOME/apps/GeoIP/lib"


This is Nginx 1.7.6, building on CentOS. I have 1.7.3 built on Ubuntu with embedded perl module and that does look in the correct location for the module, though I can't remember if I had to change anything to get that working.

Can anyone tell me what I need to do to get it to look in the arch-name subfolder for the module?

Thanks

Dave