diff --git a/graphviz.spec b/graphviz.spec
index ef997e3..f103f8d 100644
--- a/graphviz.spec
+++ b/graphviz.spec
@@ -71,6 +71,8 @@ BuildRequires:	pkgconfig(xmu)
 BuildRequires:	pkgconfig(xt)
 BuildRequires:	pkgconfig(zlib)
 Buildrequires:  pkgconfig(gts)
+BuildRequires:  llvm17
+BuildRequires:  stdc++-gcc10-devel
 
 Conflicts: %{mklibname graphviz 4} < 2.20.3-3
 
@@ -386,6 +388,13 @@ Static development package for %{name}.
 #patch1 -p1 -b .cve~
 
 %build
+export CC=/opt/llvm17/bin/clang
+export CXX=/opt/llvm17/bin/clang++
+
+export LDFLAGS="-lstdc++-gcc10"
+export CFLAGS="-I/usr/include/libstdc++-gcc10 -I/usr/include/libstdc++-gcc10/%{_host}"
+export CXXFLAGS="-I/usr/include/libstdc++-gcc10 -I/usr/include/libstdc++-gcc10/%{_host}"
+
 autoreconf -fi
 %configure2_5x \
 	--with-x \