make install: Error while loading shared libraries

I installed an rpm package for x265 using fpm and when I run the command x265 --version I get this error:

error while loading shared libraries: libx265.so.162: cannot open shared object file: No such file or directory

That command was working when I tested the executable binary before converting the source files into an rpm package.

# RPM Installed files

The file the error is refering to exists as seen below from the output of using the find command:

/local/lib/pkgconfig/x265.pc
./local/lib/libx265.a
./local/lib/libx265.so
./local/lib/libx265.so.162
./local/include/x265_config.h
./local/include/x265.h
./local/bin/x265
./lib64/libx265_main12.so.151
./lib64/libx265_main10.so.151
./lib64/libx265.so.151
./share/licenses/x265-libs

# Additional comments

It may be useful to consider the last line from running the command make install DESTDIR=/tmp/installdir as I think it could be the problem:

...
Install the project...
-- Install configuration: "Release"
-- Installing: /tmp/installdir/usr/local/lib/libx265.a
-- Installing: /tmp/installdir/usr/local/include/x265.h
-- Installing: /tmp/installdir/usr/local/include/x265_config.h
-- Installing: /tmp/installdir/usr/local/lib/libx265.so.162
-- Installing: /tmp/installdir/usr/local/lib/libx265.so
-- Installing: /tmp/installdir/usr/local/lib/pkgconfig/x265.pc
-- Installing: /tmp/installdir/usr/local/bin/x265
-- Set runtime path of "/tmp/installdir/usr/local/bin/x265" to ""

I'm not sure what this means but setting the runtime path to an empty string doesn't seem like a good idea. Would it be necessary to somehow define the runtime path in the cmake command as a possible solution?