New comment by zenny on void-packages repository

https://github.com/void-linux/void-packages/issues/26349#issuecomment-731377318

Comment:
> We don't use `pkgdir`, we use `DESTDIR`.

Thanks @ericonr. 

I replaced all instances of  `pkgdir` with `DESTDIR`, 

```
# Template file for 'rhvoice'
pkgname=rhvoice
version=1.2.3
revision=1
wrksrc="RHVoice-${version}"
build_style=scons
depends="speech-dispatcher libpulseaudio"
makedepends="scons portaudio libao"
optdepends="'portaudio: for portaudio backend' 'libao: for ao backend'"
backup="etc/RHVoice/RHVoice.conf"
short_desc="Free and open source speech synthesizer for Russian and other languages"
maintainer="/dev/null"
license="GPL-3.0-or-later"
homepage="https://github.com/Olga-Yakovleva/RHVoice"
distfiles="https://github.com/Olga-Yakovleva/RHVoice/archive/${version}.tar.gz"
checksum=d104f20dc75fcd133d21751a6e894d34b423e12e4784350b4b9573c727fb71cd


build() {
        cd "$wrksrc/RHVoice-${version}"
        scons prefix="/usr" sysconfdir="/etc" CPPFLAGS="$CPPFLAGS" CCFLAGS="$CFLAGS" \
              LINKFLAGS="$LDFLAGS"
}

package() {
        cd "$wrksrc/RHVoice-${version}"
        mkdir -p "${DESTDIR}/usr/lib/speech-dispatcher-modules"
scons install DESTDIR="${DESTDIR}" prefix="/usr" sysconfdir="/etc" \
              CPPFLAGS="$CPPFLAGS" CCFLAGS="$CFLAGS" LINKFLAGS="$LDFLAGS"
        ln -s "/usr/bin/sd_rhvoice" "${DESTDIR}/usr/lib/speech-dispatcher-modules/sd_rhvoice"

```

Also, appended following 3 lines to `common/shlibs`

```
$ rg libRHVoice common/shlibs
3997:libRHVoice.so.5 rhvoice-1.2.3_1
3998:libRHVoice_audio.so.2 rhvoice-1.2.3_1
3999:libRHVoice_core.so.4 rhvoice-1.2.3_1
```

The package gets built, but it does not behave as expected (no `RHVoice` binary nor `sd_rhvoice` installed) after running ` $ sudo xbps-install --repository=hostdir/binpkgs rhvoice`. No errors either.