Replaced python.app target with osxapps (it builds more than
one .app nowadays) and fixed it to work.
diff --git a/Makefile.pre.in b/Makefile.pre.in
index efa31c4..7e65478 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -796,9 +796,9 @@
 
 # Build Python executable that can run GUI code. Another MacOSX pseudo
 # target.
-python.app:
-	$(MAKE) -f $(srcdir)/Mac/OSX/Makefile install installmacsubtree \
-		PYTHONSRCDIR=$(srcdir) PYTHONBUILDDIR=.
+osxapps:
+	$(MAKE) -f $(srcdir)/Mac/OSX/Makefile installmacsubtree install_all \
+		srcdir=$(srcdir) builddir=.
 
 # Build the toplevel Makefile
 Makefile.pre: Makefile.pre.in config.status