diff --git a/debian/changelog b/debian/changelog
index 32d4c442..6813b831 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -7,6 +7,8 @@ llvm-toolchain-snapshot (1:14~++20210918111948+6a2c2263fbca-1~exp1) UNRELEASED;
   * Also install libomptarget-nvptx in libomp-X.Y-dev next to amdgcn
   * Add -DLLVM_ENABLE_PER_TARGET_RUNTIME_DIR=OFF. it was turn on by default
     in https://reviews.llvm.org/D107799
+    It was causing the second cmake (stage2) build to fail on z3 or libffi.
+    Sign that the compiler didn't work correctly.
 
   [ John Paul Adrian Glaubitz ]
   * Disable libunwind on m68k, sparc64 and x32