diff --git a/recipes-devtools/python/python3_%.bbappend b/recipes-devtools/python/python3_%.bbappend
new file mode 100644
index 0000000..0c479f8
--- /dev/null
+++ b/recipes-devtools/python/python3_%.bbappend
@@ -0,0 +1,3 @@
+# This build relies on this matching up with HOST_PREFIX, as it doesn't seem
+# to use CROSS_COMPILE everywhere. Align it here to fix the build.
+HOST_SYS = "${@'${HOST_PREFIX}'[:-1]}"