diff --git a/aliases.sh b/aliases.sh
index 8ca4235..c8b4910 100755
--- a/aliases.sh
+++ b/aliases.sh
@@ -82,8 +82,8 @@ which alsamixer &>/dev/null && alias alsamixer='alsamixer -g' && alias equilizer
 [ -x /usr/libexec/mc/mc-wrapper.sh ] && alias mc='. /usr/libexec/mc/mc-wrapper.sh -x'
 which network.sh &>/dev/null && alias net='network.sh'
 which colordiff &>/dev/null && alias diff='colordiff'
-alias make="make -j$((`grep ^processor /proc/cpuinfo -c`+1))"
-which colormake &>/dev/null && alias make="colormake -j$((`grep ^processor /proc/cpuinfo -c`+1))"
+alias make="make -j$((`getconf _NPROCESSORS_ONLN`+1))"
+which colormake &>/dev/null && alias make="colormake -j$((`getconf _NPROCESSORS_ONLN`+1))"
 which colorgcc &>/dev/null && {
 	alias c++='/usr/lib/colorgcc/bin/c++'
 	alias cc='/usr/lib/colorgcc/bin/cc'
diff --git a/functions.sh b/functions.sh
index 447d525..faedfd6 100755
--- a/functions.sh
+++ b/functions.sh
@@ -13,13 +13,13 @@ extract () {
   elif [ -f "$1" ] ; then
     case $1 in
     *.tar.bz2|*.tbz2|*.tbz)   which lbunzip2 &>/dev/null \
-                                && lbunzip2 -c -kn$((`grep "^processor" /proc/cpuinfo -c`+1)) $1 | tar xf - \
+                                && lbunzip2 -c -kn$((`getconf _NPROCESSORS_ONLN`+1)) $1 | tar xf - \
                                 || tar xjf $1 ;;
     *.tar.gz|*.tgz)           tar xzf $1 ;;
     *.tar.xz|*.txz)           tar xJf $1 ;;
     *.tar)                    tar xf $1 ;;
     *.bz2)                    which lbunzip2 &>/dev/null \
-                                && lbunzip2 -kn$((`grep "^processor" /proc/cpuinfo -c`+1)) $1 \
+                                && lbunzip2 -kn$((`getconf _NPROCESSORS_ONLN`+1)) $1 \
                                 || bunzip2 -k $1 ;;
     *.gz)                     gunzip -c $1 > ${1%.gz} || rm -f ${1%.gz} ;;
     *.xz)                     unxz -k $1 ;;
@@ -46,7 +46,7 @@ pk () {
       t*x*|t*J*)      tar cJvf $2.tar.xz  $2 ;;
       t*r)            tar cpvf $2.tar  $2 ;;
       b*z*)           which lbzip2 &>/dev/null \
-                        && lbzip2 -9 -kn$((`grep "^processor" /proc/cpuinfo -c`+1)) $2 \
+                        && lbzip2 -9 -kn$((`getconf _NPROCESSORS_ONLN`+1)) $2 \
                         || bzip2 -9 -k $2 ;;
       g*z)            gzip -c -9 -n $2 > $2.gz || rm -f $2.gz ;;
       x*z)            xz -k -9 $2 ;;