diff --git a/setup/env.sh b/setup/env.sh
index 8b8cd22..a6dd05e 100644
--- a/setup/env.sh
+++ b/setup/env.sh
@@ -3,7 +3,11 @@
 # ---------------------------------------------------------------------------------------------------------------------
 # OS setup
 
-if [ "${MACOS}" -eq 1 ]; then
+if [ "${LINUX}" -eq 1 ]; then
+    CMAKE_SYSTEM_NAME="Linux"
+    PAWPAW_TARGET="linux"
+
+elif [ "${MACOS}" -eq 1 ]; then
     CMAKE_SYSTEM_NAME="Darwin"
     if [ "${MACOS_OLD}" -eq 1 ]; then
         PAWPAW_TARGET="macos-old"
@@ -19,10 +23,6 @@ elif [ "${WIN32}" -eq 1 ]; then
         PAWPAW_TARGET="win32"
     fi
 
-elif [ "${LINUX}" -eq 1 ]; then
-    CMAKE_SYSTEM_NAME="Linux"
-    PAWPAW_TARGET="linux"
-
 else
     echo "Unknown target '${target}'"
     exit 4
@@ -111,9 +111,12 @@ TARGET_PKG_CONFIG_PATH="${PAWPAW_PREFIX}/lib/pkgconfig"
 # ---------------------------------------------------------------------------------------------------------------------
 # other
 
-# "-j 2"
 MAKE_ARGS=""
 
+if which nproc > /dev/null; then
+    MAKE_ARGS+="-j $(nproc)"
+fi
+
 if [ "${CROSS_COMPILING}" -eq 1 ]; then
     MAKE_ARGS="${MAKE_ARGS} CROSS_COMPILING=true"
 fi
diff --git a/setup/functions.sh b/setup/functions.sh
index e45d297..018d0b6 100644
--- a/setup/functions.sh
+++ b/setup/functions.sh
@@ -153,7 +153,7 @@ function build_autoconf() {
 
     if [ ! -f "${pkgdir}/.stamp_installed" ]; then
         pushd "${pkgdir}"
-        make ${MAKE_ARGS} install
+        make ${MAKE_ARGS} install -j 1
         touch .stamp_installed
         popd
     fi
@@ -186,7 +186,7 @@ function build_conf() {
 
     if [ ! -f "${pkgdir}/.stamp_installed" ]; then
         pushd "${pkgdir}"
-        make ${MAKE_ARGS} install
+        make ${MAKE_ARGS} -j 1 install
         touch .stamp_installed
         popd
     fi
@@ -224,7 +224,7 @@ function build_cmake() {
 
     if [ ! -f "${pkgdir}/.stamp_installed" ]; then
         pushd "${pkgdir}/build"
-        make ${MAKE_ARGS} install
+        make ${MAKE_ARGS} -j 1 install
         touch ../.stamp_installed
         popd
     fi
@@ -252,7 +252,7 @@ function build_make() {
 
     if [ ! -f "${pkgdir}/.stamp_installed" ]; then
         pushd "${pkgdir}"
-        make PREFIX="${PAWPAW_PREFIX}" PKG_CONFIG="${TARGET_PKG_CONFIG}" ${MAKE_ARGS} install
+        make PREFIX="${PAWPAW_PREFIX}" PKG_CONFIG="${TARGET_PKG_CONFIG}" ${MAKE_ARGS} -j 1 install
         touch .stamp_installed
         popd
     fi
@@ -297,6 +297,39 @@ function build_meson() {
     _postbuild
 }
 
+function build_qmake() {
+    local name="${1}"
+    local version="${2}"
+    local extraconfrules="${3}"
+
+    local pkgdir="${PAWPAW_BUILDDIR}/${name}-${version}"
+
+    _prebuild "${name}" "${pkgdir}"
+
+    if [ ! -f "${pkgdir}/.stamp_configured" ]; then
+        pushd "${pkgdir}"
+        qmake ${extraconfrules}
+        touch .stamp_configured
+        popd
+    fi
+
+    if [ ! -f "${pkgdir}/.stamp_built" ]; then
+        pushd "${pkgdir}"
+        make ${MAKE_ARGS}
+        touch .stamp_built
+        popd
+    fi
+
+    if [ ! -f "${pkgdir}/.stamp_installed" ]; then
+        pushd "${pkgdir}"
+        make ${MAKE_ARGS} -j 1 install
+        touch .stamp_installed
+        popd
+    fi
+
+    _postbuild
+}
+
 function build_waf() {
     local name="${1}"
     local version="${2}"
@@ -370,7 +403,7 @@ function build_host_autoconf() {
 
     if [ ! -f "${pkgdir}/.stamp_installed" ]; then
         pushd "${pkgdir}"
-        make install
+        make ${MAKE_ARGS} install -j 1
         touch .stamp_installed
         popd
     fi