diff --git a/debian/changelog b/debian/changelog
index 61e52a28..2c07f439 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,12 @@
+llvm-toolchain-12 (1:12.0.0~++rc5-2) unstable; urgency=medium
+
+  * Add -DCMAKE_SUPPRESS_REGENERATION=ON to limit the number of calls
+    to cmake
+    Try to workaround a bug on llvm-toolchain-stretch-12-binaries
+    architecture=s390x,stretch
+
+ -- Sylvestre Ledru <sylvestre@debian.org>  Sat, 10 Apr 2021 14:59:07 +0200
+
 llvm-toolchain-12 (1:12.0.0~++rc5-1) unstable; urgency=medium
 
   * New testing upstream release
diff --git a/debian/rules b/debian/rules
index 6518b446..f089879b 100755
--- a/debian/rules
+++ b/debian/rules
@@ -385,6 +385,7 @@ override_dh_auto_configure: preconfigure
 	cd $(TARGET_BUILD) && \
 	LD_LIBRARY_PATH=$$LD_LIBRARY_PATH $(PRE_PROCESS_CONF) $$CMAKE_BIN ../llvm/ \
 	-DLLVM_ENABLE_PROJECTS="$(PROJECTS_LIST)" \
+	-DCMAKE_SUPPRESS_REGENERATION=ON \
 	-DCMAKE_INSTALL_PREFIX=/usr/lib/llvm-$(LLVM_VERSION) \
 	-DCMAKE_VERBOSE_MAKEFILE=ON \
 	-DCMAKE_BUILD_TYPE=RelWithDebInfo \