diff --git a/pisi/archive.py b/pisi/archive.py
index 074fffcd..8d30da72 100644
--- a/pisi/archive.py
+++ b/pisi/archive.py
@@ -139,3 +139,6 @@ class Archive:
 
     def unpack(self, targetDir):
 	self.archive.unpack(targetDir)
+
+    def unpack_file(self, targetDir):
+	self.archive.unpack(targetDir)
diff --git a/pisi/util.py b/pisi/util.py
index b5832671..8e10f101 100644
--- a/pisi/util.py
+++ b/pisi/util.py
@@ -37,7 +37,7 @@ def prefix(a, b):
     "check if sequence a is a prefix of sequence b"
     if len(a)>len(b):
         return False
-    for i in [0:len(a)-1):
+    for i in range(0,len(a)-1):
         if a[i]!=b[i]:
             return False
     return True
@@ -55,7 +55,7 @@ def commonprefix(l):
     returns a list of path components"""
     common = []
     comps = map(os.path.split, l)
-    for i in [0:min(len,l)-1]:
+    for i in range(0, min(len,l)-1):
         compi = map(lambda x: x[i], comps) # get ith slice
         if same(compi):
             common.append(compi[0])
diff --git a/tests/archivetests.py b/tests/archivetests.py
index 617cb8b9..6f45224e 100644
--- a/tests/archivetests.py
+++ b/tests/archivetests.py
@@ -64,6 +64,19 @@ class ArchiveFileTestCase(unittest.TestCase):
 	testfile = targetDir + "/sandbox/deneme/hed"
 	assert islink(testfile)
 	
+    def testUnpackZipCond(self):
+	ctx = context.Context("tests/sandbox/sandbox.pspec")
+	fetch = fetcher.Fetcher(ctx)
+	fetch.fetch()
+	targetDir = ctx.pkg_work_dir()
+	assert ctx.spec.source.archiveType == "zip"
+        fileName = os.path.basename(ctx.spec.source.archiveUri)
+        filePath = ctx.archives_dir() + '/' + fileName
+	achv = archive.Archive(filePath, ctx.spec.source.archiveType)
+	achv.unpack_file("sandbox/borek.cd")
+	assert pathexists(targetDir + "/sandbox")
+	testfile = targetDir + "/sandbox/borek.cs"
+	assert pathexists(testfile)
 
 
 suite = unittest.makeSuite(ArchiveFileTestCase)