nixpkgs/pkgs/development/libraries/qt-5/hooks/qmake-hook.sh

qmakeFlags=( $qmakeFlags )

qmakePrePhase() {
    qmakeFlags=( \
        "PREFIX=$out" \
        "NIX_OUTPUT_OUT=$out" \
        "NIX_OUTPUT_DEV=${!outputDev}" \
        "NIX_OUTPUT_BIN=${!outputBin}" \
        "NIX_OUTPUT_DOC=${!outputDev}/${qtDocPrefix:?}" \
        "NIX_OUTPUT_QML=${!outputBin}/${qtQmlPrefix:?}" \
        "NIX_OUTPUT_PLUGIN=${!outputBin}/${qtPluginPrefix:?}" \
        "${qmakeFlags[@]}" \
    )
}
prePhases+=" qmakePrePhase"

qmakeConfigurePhase() {
    runHook preConfigure

    echo "QMAKEPATH=$QMAKEPATH"
    echo qmake "${qmakeFlags[@]}"
    qmake "${qmakeFlags[@]}"

    if ! [[ -v enableParallelBuilding ]]; then
        enableParallelBuilding=1
        echo "qmake: enabled parallel building"
    fi

    runHook postConfigure
}

if [ -z "$dontUseQmakeConfigure" -a -z "$configurePhase" ]; then
    configurePhase=qmakeConfigurePhase
fi