diff --git a/src/libbuild/shell.py b/src/libbuild/shell.py
index 2f33d41f..fc3dcb49 100644
--- a/src/libbuild/shell.py
+++ b/src/libbuild/shell.py
@@ -5,37 +5,37 @@ import sys, re
 from itertools import izip, imap, count, ifilter, ifilterfalse
 
 def cat( filename ):
-    return file( filename ).xreadlines()
+	return file( filename ).xreadlines()
 
 class grep:
-    """keep only lines that match the regexp"""
-    def __init__( self,pat, flags = 0 ):
-        self.fun = re.compile( pat, flags ).match
-    def __ror__( self, input ):
-        return ifilter( self.fun, input )
+	"""keep only lines that match the regexp"""
+	def __init__( self,pat, flags = 0 ):
+		self.fun = re.compile( pat, flags ).match
+	def __ror__( self, input ):
+		return ifilter( self.fun, input )
 
 class tr:
-    """apply arbitrary transform to each sequence element"""
-    def __init__( self, transform ):
-        self.tr = transform
-    def __ror__( self, input ):
-        return imap( self.tr, input )
+	"""apply arbitrary transform to each sequence element"""
+	def __init__( self, transform ):
+		self.tr = transform
+	def __ror__( self, input ):
+		return imap( self.tr, input )
 
 class printto:
-    """print sequence elements one per line"""
-    def __init__( self, out = sys.stdout ):
-        self.out=out
-    def __ror__( self,input ):
-        for l in input:
-            print >> self.out, l
+	"""print sequence elements one per line"""
+	def __init__( self, out = sys.stdout ):
+		self.out = out
+	def __ror__( self,input ):
+		for l in input:
+			print >> self.out, l
 
 printlines = printto( sys.stdout )
 
 class terminator:
-        def __init__( self,method ):
-                self.process = method
-        def __ror__( self,input ):
-                return self.process( input )
+	def __init__( self,method ):
+		self.process = method
+	def __ror__( self,input ):
+		return self.process( input )
 
 aslist = terminator( list )
 asdict = terminator( dict )
@@ -44,20 +44,20 @@ join = terminator( "".join )
 enum = terminator( enumerate )
 
 class sort:
-    def __ror__( self,input ):
-        ll = list( input )
-        ll.sort()
-        return ll
+	def __ror__( self,input ):
+		ll = list( input )
+		ll.sort()
+		return ll
 sort = sort()
 
 class uniq:
-    def __ror__( self,input ):
-        for i in input:
-            try:
-                if i == prev:
-                    continue
-            except NameError:
-                pass            
-            prev = i
-            yield i
+	def __ror__( self,input ):
+		for i in input:
+			try:
+				if i == prev:
+					continue
+			except NameError:
+				pass            
+			prev = i
+			yield i
 uniq = uniq()