diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index a03cb49d81abffbb468675b9305f4c7646e40d83..75356ba723a879caa8e45e1e5fecf199e11c5bb4 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -3,13 +3,8 @@ build:
   image: smokserwis/docker-docs-build
   script:
     - mkdir dist
-    - python build.py lab1
-    - python build.py lab2
-    - python build.py lab3
+    - python build.py
     - cp resources/lab3_program.txt dist/lab3/program.txt
-    - python build.py lab4
-    - python build.py lab5
-    - python build.py lab6
     - mv -f dist/* .
   artifacts:
      paths:
diff --git a/build.py b/build.py
index f3b113add6766d7d24bb4d59132871283460241e..2913dff9560c2913706c14ebc2bc62fea012b0cd 100644
--- a/build.py
+++ b/build.py
@@ -1,49 +1,50 @@
-#!/usr/bin/python
 # coding=UTF-8
 from __future__ import print_function
-import os, json, sys
+import json, sys
 import os.path
 
 
 if __name__ == '__main__':
-    dist_lp = 'dist/' + sys.argv[1] + '/'
-    src_md = 'src/' + sys.argv[1] + '.md'
-
-    if not os.path.exists(src_md):
-        print('Aborting, no src file')
-        sys.exit()
-
-    with open('src/header.md') as fh, open('src/footer.md', 'rb') as ff:
-        header_bin = fh.read()
-        footer_bin = ff.read()
-
-    # Lab1
-    try:
-        os.makedirs(dist_lp)
-    except OSError:
-        pass
-
-    with open(src_md, 'rb') as labin:
-        if os.path.exists('src/'+sys.argv[1]+'.json'):
-            with open('src/' + sys.argv[1] + '.json', 'rb') as datin:
-                data = json.load(datin)
-        else:
-            data = [{}]
-
-        lab = labin.read().decode('utf8')
-
-    for ex_no, d in enumerate(data, start=1):
-        plab = lab
-        d['lp'] = unicode(ex_no)
-        print('Processing %s-%s' % (sys.argv[1], ex_no, ))
-
-        for k, v in d.iteritems():
-            plab = plab.replace(u'$%s$' % (k, ), v)
-
-        with open(dist_lp+'%s.md' % (ex_no, ), 'wb') as labout:
-            labout.write(header_bin)
-            labout.write(plab.encode('utf8'))
-            labout.write(footer_bin)
-
-        os.system(('pandoc %s%s.md -s -o %s%s.pdf') % (dist_lp, ex_no, dist_lp, ex_no))
-        os.unlink(dist_lp+'%s.md' % (ex_no, ))
+
+    for lab_name in ['lab1', 'lab2', 'lab3', 'lab4', 'lab5', 'lab6']:
+        dist_lp = 'dist/' + lab_name + '/'
+        src_md = 'src/' + lab_name + '.md'
+
+        if not os.path.exists(src_md):
+            print('Aborting, no src file')
+            sys.exit()
+
+        with open('src/header.md') as fh, open('src/footer.md', 'rb') as ff:
+            header_bin = fh.read()
+            footer_bin = ff.read()
+
+        # Lab1
+        try:
+            os.makedirs(dist_lp)
+        except OSError:
+            pass
+
+        with open(src_md, 'rb') as labin:
+            if os.path.exists('src/'+lab_name+'.json'):
+                with open('src/' + lab_name + '.json', 'rb') as datin:
+                    data = json.load(datin)
+            else:
+                data = [{}]
+
+            lab = labin.read().decode('utf8')
+
+        for ex_no, d in enumerate(data, start=1):
+            plab = lab
+            d['lp'] = unicode(ex_no)
+            print('Processing %s-%s' % (lab_name, ex_no, ))
+
+            for k, v in d.iteritems():
+                plab = plab.replace(u'$%s$' % (k, ), v)
+
+            with open(dist_lp+'%s.md' % (ex_no, ), 'wb') as labout:
+                labout.write(header_bin)
+                labout.write(plab.encode('utf8'))
+                labout.write(footer_bin)
+
+            os.system(('pandoc %s%s.md -s -o %s%s.pdf') % (dist_lp, ex_no, dist_lp, ex_no))
+            os.unlink(dist_lp+'%s.md' % (ex_no, ))