kc3-lang/kc3

diff --git a/window/cairo/xcb/configure b/window/cairo/xcb/configure
index 36b6917..dba39d4 100755
--- a/window/cairo/xcb/configure
+++ b/window/cairo/xcb/configure
@@ -40,7 +40,7 @@ OBJECTS_COV="$(c2ext .cov.lo "$SOURCES")"
 OBJECTS_DEBUG="$(c2ext .debug.lo "$SOURCES")"
 
 # Common config for all targets
-CPPFLAGS="$CPPFLAGS -I../../.."
+CPPFLAGS="-I../../.. $CPPFLAGS"
 CFLAGS="$CFLAGS -W -Wall -Werror -std=c11 -pedantic -pipe"
 LDFLAGS="--shared ${LDFLAGS}"
 config_asan
diff --git a/window/cairo/xcb/demo/configure b/window/cairo/xcb/demo/configure
index c52fa66..80455a6 100755
--- a/window/cairo/xcb/demo/configure
+++ b/window/cairo/xcb/demo/configure
@@ -47,7 +47,7 @@ echo "OBJECTS_DEBUG = $OBJECTS_DEBUG" >> ${CONFIG_MK}
 
 # Common config for all targets
 CFLAGS="$CFLAGS -W -Wall -Werror -std=c11 -pedantic"
-CPPFLAGS="$CPPFLAGS -I../../../.."
+CPPFLAGS="-I../../../.. $CPPFLAGS"
 config_asan
 config_gnu
 config_i386