diff --git a/vulkan-validationlayers.spec b/vulkan-validationlayers.spec
index 9221cfc..70afca7 100644
--- a/vulkan-validationlayers.spec
+++ b/vulkan-validationlayers.spec
@@ -75,6 +75,14 @@ perl -i -pe 's{\@PACKAGE_VERSION\@}{%version}' CMakeLists.txt
 
 %build
 %limit_build -m 2000
+# C++ <thread> needs -lpthread for pthread_create
+# (under glibc>=2.34 it's not strictly needed anymore due to symbol move)
+cat >gxx <<-EOF
+	#!/bin/sh
+	exec g++ "\$@" -lpthread
+EOF
+chmod a+x gxx
+export CXX="$PWD/gxx"
 %cmake -DGLSLANG_INSTALL_DIR="%_bindir" \
 	-DSPIRV_HEADERS_INSTALL_DIR="%_includedir" \
 	-DBUILD_LAYER_SUPPORT_FILES=ON \