diff --git a/Makefile b/Makefile
index f87fd9e..9f81b91 100644
--- a/Makefile
+++ b/Makefile
@@ -4,6 +4,7 @@
 PACKAGE=pdfminer
 
 PYTHON=python
+GIT=git
 RM=rm -f
 CP=cp -f
 
@@ -50,10 +51,5 @@ test: cmap
 test_clean:
 	-cd samples && $(MAKE) clean
 
-SED=sed
-FIND=find . '(' -name .git -o -name .svn -o -name CVS -o -name dev -o -name dist -o -name build ')' -prune -false -o
-SORT=sort
-TOUCH=touch
 MANIFEST:
-	$(TOUCH) MANIFEST
-	$(FIND) -type f '!' -name '.*' | $(SED) 's:./::' | $(SORT) > MANIFEST
+	$(GIT) ls-tree --name-only -r HEAD > MANIFEST
diff --git a/pdfminer/__init__.py b/pdfminer/__init__.py
index 459faa7..7778e0a 100644
--- a/pdfminer/__init__.py
+++ b/pdfminer/__init__.py
@@ -1,4 +1,4 @@
 #!/usr/bin/env python
-__version__ = '20100619p1'
+__version__ = '20100829'
 
 if __name__ == '__main__': print __version__