Not able to "rpmbuild -ba" mingw-aubio.spec

[mikefarmer01]

While trying to build mingw-aubio (rpmbuild -ba mingw-aubio.spec), I get the following error:

Error while building the RPM:
    File not found: /home/makerpm/rpmbuild/BUILDROOT/mingw-aubio-0.4.2-1.fc24.x86_64/usr/i686-w64-mingw32/sys-root/mingw/lib/libaubio*dll.a
    File not found: /home/makerpm/rpmbuild/BUILDROOT/mingw-aubio-0.4.2-1.fc24.x86_64/usr/i686-w64-mingw32/sys-root/mingw/lib/pkgconfig/aubio.pc

However, it exists the directory described in the error message, despite that "lib" is replaced with "lib64".
So:
/home/makerpm/rpmbuild/BUILDROOT/mingw-aubio-0.4.2-1.fc24.x86_64/usr/i686-w64-mingw32/sys-root/mingw/lib64/pkgconfig/aubio.pc
And
/home/makerpm/rpmbuild/BUILDROOT/mingw-aubio-0.4.2-1.fc24.x86_64/usr/i686-w64-mingw32/sys-root/mingw/lib64/libaubio*dll.a
do exist.

This is the first time I submit an Issue, so there might be formal errors 😬

SOURCE_SPEC.zip