diff --git a/debian/rules b/debian/rules
index cd7fbe65..e4327af3 100755
--- a/debian/rules
+++ b/debian/rules
@@ -364,6 +364,7 @@ override_dh_auto_configure: preconfigure
 	-DLLVM_INSTALL_UTILS=ON \
 	-DLLVM_VERSION_SUFFIX= \
 	-DLLVM_ENABLE_SPHINX=ON \
+	-DSPHINX_WARNINGS_AS_ERRORS=OFF \
 	-DLLVM_ENABLE_RTTI=ON \
 	-DLLVM_ENABLE_FFI=ON \
 	-DLLVM_ENABLE_DUMP=ON \
@@ -376,15 +377,10 @@ override_dh_auto_configure: preconfigure
 	$(Z3_FLAG) \
 	-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD="AVR" \
 	-DLLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN=ON \
-	-DLIBCLANG_LIBRARY_VERSION=$(SONAME_EXT) \
 	-DCLANG_VENDOR=$(VENDOR) \
 	-DCLANG_ENABLE_BOOTSTRAP=ON \
 	-DCLANG_BUILD_EXAMPLES=OFF \
-	-DCOMPILER_RT_USE_LIBCXX=NO \
-	-DENABLE_LINKER_BUILD_ID=ON \
 	-DLLVM_POLLY_LINK_INTO_TOOLS=OFF \
-	-DPOLLY_BUNDLED_JSONCPP=OFF \
-	-DSPHINX_WARNINGS_AS_ERRORS=OFF \
 	-DBOOTSTRAP_CMAKE_CXX_FLAGS='$(BOOTSTRAP_CXXFLAGS_EXTRA)' \
 	-DBOOTSTRAP_CMAKE_C_FLAGS='$(BOOTSTRAP_CFLAGS_EXTRA)' \
 	-DCLANG_BOOTSTRAP_PASSTHROUGH="CMAKE_INSTALL_PREFIX;CMAKE_VERBOSE_MAKEFILE;CMAKE_BUILD_TYPE;CMAKE_CXX_FLAGS_RELWITHDEBINFO;LLVM_LINK_LLVM_DYLIB;LLVM_INSTALL_UTILS;LLVM_VERSION_SUFFIX;LLVM_ENABLE_SPHINX;SPHINX_WARNINGS_AS_ERRORS;LLVM_BUILD_LLVM_DYLIB;LLVM_ENABLE_RTTI;LLVM_ENABLE_FFI;LIBCLANG_LIBRARY_VERSION;ENABLE_LINKER_BUILD_ID;POLLY_BUNDLED_JSONCPP;LLVM_EXPERIMENTAL_TARGETS_TO_BUILD;LLVM_USE_PERF;LLVM_ENABLE_ASSERTIONS;LLVM_BINUTILS_INCDIR;LLVM_HOST_TRIPLE;LLVM_COMPILER_CHECKED;COMPILER_RT_BUILD_BUILTINS;LIBOMP_LIBFLAGS;CMAKE_SHARED_LINKER_FLAGS;PYTHON_EXECUTABLE;LLVM_ENABLE_Z3_SOLVER;LLVM_POLLY_LINK_INTO_TOOLS"