# Preserve only libspa-libcamera.so in $PKG/_keep
mkdir -p "$PKG/_keep/usr/lib64/spa-0.2/libcamera"
mv "$PKG/usr/lib64/spa-0.2/libcamera/libspa-libcamera.so" \
   "$PKG/_keep/usr/lib64/spa-0.2/libcamera/"

# Delete everything in $PKG except _keep
find "$PKG" -mindepth 1 -maxdepth 1 ! -name '_keep' -exec rm -rf {} +

# Restore preserved content
mv "$PKG/_keep/"* "$PKG/"
rmdir "$PKG/_keep"