diff --git a/external-winehq.sh b/external-winehq.sh
index c34d226..d541f16 100644
--- a/external-winehq.sh
+++ b/external-winehq.sh
@@ -34,7 +34,7 @@ do
     apt-cache show $i | grep 'Version:' | cut -d":" -f2 | head -n1 | sed 's/ //g' > $i-pika-i386
     rm -rf /etc/apt/preferences.d/0-external-sync.conf
     apt-cache show $i | grep 'Version:' | cut -d":" -f2 | head -n1 | sed 's/ //g' > $i-external-i386
-    if [[ $(cat $i-pika-i386) != $(cat $i-external-i386) ]]
+    if cat $i-pika-i386 | grep "^"$(cat $i-external-i386)"$"
     then
         echo $i >> ppp32.list
     fi
@@ -53,7 +53,7 @@ do
     apt-cache show $i | grep 'Version:' | cut -d":" -f2 | head -n1 | sed 's/ //g' > $i-pika-amd64
     rm -rf /etc/apt/preferences.d/0-external-sync.conf
     apt-cache show $i | grep 'Version:' | cut -d":" -f2 | head -n1 | sed 's/ //g' > $i-external-amd64
-    if [[ $(cat $i-pika-amd64) != $(cat $i-external-amd64) ]]
+    if cat $i-pika-amd64 | grep "^"$(cat $i-external-amd64)"$"
     then
         echo $i >> ppp64.list
     fi