diff --git a/.gitignore b/.gitignore
index d84a059a..97832f5c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -47,7 +47,7 @@ mydbstub.py*
 /sip/cpp/*.cpp
 /sip/cpp-*
 /sip/gen/*.sip
-/sip/siplib/.update
+/sip/siplib
 
 /wx/*.py
 /wx/*.pyc
diff --git a/build.py b/build.py
index 18a886ba..82874d3b 100755
--- a/build.py
+++ b/build.py
@@ -1256,7 +1256,7 @@ def cmd_sip(options, args):
         tmpdir = tmpdir.replace('\\', '/')
         src_name = src_name.replace('\\', '/')
         base = os.path.basename(os.path.splitext(src_name)[0])
-        sbf = posixjoin(cfg.SIPOUT, base) + '.sbf'
+        sbf = posixjoin(cfg.ROOT_DIR, cfg.SIPOUT, base) + '.sbf'
         pycode = base[1:] # remove the leading _
         pycode = opj(cfg.ROOT_DIR, cfg.PKGDIR, pycode) + '.py'