diff --git a/debian/changelog b/debian/changelog
index faa1f08b..88b9b9d3 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -129,6 +129,7 @@ llvm-toolchain-snapshot (1:13~++20210129063721+010b176cdefb-1~exp1) experimental
 llvm-toolchain-12 (1:12.0.1-7) UNRELEASED; urgency=medium
 
   * cmake: use ON instead of YES for consistency
+  * Add debian/source/options to ignore the diff (much much faster to repack)
   * Add LIBCXXABI_ENABLE_STATIC_UNWINDER=ON
     LIBCXXABI_STATICALLY_LINK_UNWINDER_IN_SHARED_LIBRARY=OFF
     LIBCXXABI_STATICALLY_LINK_UNWINDER_IN_STATIC_LIBRARY=ON
diff --git a/debian/source/options b/debian/source/options
new file mode 100644
index 00000000..976f27ab
--- /dev/null
+++ b/debian/source/options
@@ -0,0 +1 @@
+extend-diff-ignore = "(^|/)(clang|clang-tools-extra|compiler-rt|CONTRIBUTING.md|debuginfo-tests|flang|integration-test-suite|libc|libclc|libcxx|libcxxabi|libunwind|lld|lldb|llvm|mlir|openmp|parallel-libs|polly|pstl|README.md|runtimes|utils|)"