testing/mold: does not properly detect mold-wrapper.so

APKBUILD says:

make DESTDIR="$pkgdir" PREFIX=/usr install

This PREFIX should install mold-wrapper.so into /usr/lib/mold/ as well as change -DLIBDIR (see Makefile) in the source code to detect the mold-wrapper.so in that directory (see elf/subprocess.cc line 278).

However, something went wrong, and while the package installs mold-wrapper.so into /usr/lib/mold/ correctly, the program itself does not detect mold-wrapper.so in /usr/lib/mold/ but instead tries to look for it in /usr/local/lib/mold/. Grepping the binary /usr/bin/mold indeed shows this result:

$ grep mold-wrapper /usr/bin/mold 
/usr/local/lib/mold/mold-wrapper.so
mold-wrapper.so is missing

Is this an issue in the package itself, or in the building process?

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