diff --git a/lib/configure.py b/lib/configure.py
index d83190c..524fcb3 100644
--- a/lib/configure.py
+++ b/lib/configure.py
@@ -1,27 +1,33 @@
 import os
-from subprocess import call
 from pathlib import Path
+import lib.pacman as pacman
+from lib.package import Package
 
-from lib.parse import Package
+installed_packages = pacman.get_installed()
 
 def install(package):
-    if not package.source:
+    if not package.install or not package.source:
         return
+    if package.source == 'core' and package.name not in installed_packages:
+        res = pacman.install(package.name)
+        
 
 def copy_config(package):
-    if not package.config:
+    if not package.copy_config or not package.config:
         return
 
 def run_script(package):
-    if not package.script:
+    if not package.run_script or not package.script:
         return
 
 def enable_units(package):
-    if not package.userunits:
+    if not package.enable_units or not package.userunits:
         return
 
 def configure(package):
-    print(vars(package))
+    if not package.enabled:
+        return
+    #print(vars(package))
     install(package)
     copy_config(package)
     run_script(package)
diff --git a/lib/pacman.py b/lib/pacman.py
new file mode 100644
index 0000000..8e1fe82
--- /dev/null
+++ b/lib/pacman.py
@@ -0,0 +1,19 @@
+import subprocess
+
+def get_installed():
+    return [line.split(' ')[0] for line in pacman('-Q').split('\n')[:-1]]
+
+def install(package):
+    pacman('-S ' + package)
+
+def pacman(flags, sudo = False):
+    cmd = ['sudo', 'pacman'] if sudo else ['pacman']
+    cmd += ['--noconfirm', flags]
+    proc = subprocess.Popen(cmd, stderr=subprocess.PIPE, stdout=subprocess.PIPE, stdin=subprocess.PIPE)
+    data = proc.communicate()
+
+    if proc.returncode != 0:
+        raise Exception('Command ' + ' '.join(cmd) + ' failed: ' + data[1].decode())
+
+    return data[0].decode()
+