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-rw-r--r--include/toplevel.mk2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/toplevel.mk b/include/toplevel.mk
index d2c8e5eb0c..4c9b85c211 100644
--- a/include/toplevel.mk
+++ b/include/toplevel.mk
@@ -31,6 +31,8 @@ unexport P4PORT P4USER P4CONFIG P4CLIENT
# prevent user defaults for quilt from interfering
unexport QUILT_PATCHES QUILT_PATCH_OPTS
+unexport C_INCLUDE_PATH
+
# make sure that a predefined CFLAGS variable does not disturb packages
export CFLAGS=