diff --git a/.github/workflows/before-script-linux.sh b/.github/workflows/before-script-linux.sh
index f5c99c9..31bb536 100755
--- a/.github/workflows/before-script-linux.sh
+++ b/.github/workflows/before-script-linux.sh
@@ -5,7 +5,7 @@ set -euxo pipefail
 if [ -f /usr/bin/yum ]; then
     echo Manylinux2010 build
 
-    yum install -y centos-release-scl llvm-toolset-7
+    yum install -y centos-release-scl llvm-toolset-7 flex-devel bison-devel
 
     source /opt/rh/llvm-toolset-7/enable