New issue by unspecd on void-packages repository

https://github.com/void-linux/void-packages/issues/29732

Description:
### System
* xuname:  
  *Void 5.10.25_1 x86_64-musl GenuineIntel uptodate rrrnFFFFFFFFFFF*
* package:  
  *qt5-5.15.2_4*

### Expected behavior
qt5 compiles and packages successfully.

### Actual behavior
```console
$ ./xbps-src pkg qt5
…
=> qt5-gui-5.15.2_4: running pre-install hook: 98-fixup-gir-path ...
=> qt5-gui-5.15.2_4: running pkg_install ...
mv: cannot stat '/destdir//qt5-5.15.2/usr/lib/libQt5XcbQpa.so*': No such file or directory
=> ERROR: qt5-gui-5.15.2_4: pkg_install: 'mv ${_destdir}/$files ${_pkgdestdir}/${_targetdir}' exited with 1
```

### etc/conf
```sh
XBPS_CFLAGS+=" -march=native -mtune=native"
XBPS_CXXFLAGS="${XBPS_CFLAGS}"
XBPS_CCACHE=yes
XBPS_MAKEJOBS=4
XBPS_DEBUG_PKGS=yes
```