diff -Naur a/program/functions.py b/program/functions.py
--- a/program/functions.py	2010-12-04 17:18:57.000000000 +0000
+++ b/program/functions.py	2015-10-13 09:34:01.093513450 +0000
@@ -57,7 +57,7 @@
-    a = commands.getoutput( 'dpkg -l' )
+    a = commands.getoutput( 'pacman -Q' )
     a = a.split( '\n' )
     for each in a:
-        if each[0:2] == 'ii' and each.split()[1] == pkg_name:
+        if each.split()[0] == pkg_name:
             return True
             
     return False