diff --git a/targets/audio b/targets/audio
index b07cb7284..38c44bfbb 100644
--- a/targets/audio
+++ b/targets/audio
@@ -57,6 +57,16 @@ if tail -n 1 "$log" | grep -q "^Error"; then
     fi
 fi
 
+# ChromiumOS >= 15378.0.0 removed autotools support (https://crrev.com/c/4322563),
+# fetch the last known good Makefile.am. We can still patch it as required.
+lastgoodam="c2ece09f69565afcbcf511b1693f3fe735bde511/cras/src/Makefile.am"
+mkdir -p "$CRASBUILDTMP/cras/src"
+# Do this unconditionally as extraction phase below would override the file if
+# it is still present in current ChromiumOS version.
+wget "https://chromium.googlesource.com/chromiumos/third_party/adhd/+/$lastgoodam?format=TEXT" -O- \
+    | base64 -d > "$CRASBUILDTMP/cras/src/Makefile.am"
+
+
 # Build CRAS ALSA plugin for the given architecture ($1)
 # A blank parameter means we are building for the native architecture.
 build_cras() {