diff --git a/.drone.yml b/.drone.yml
index 8e93d7b..a8c5b6b 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -129,11 +129,10 @@ pipeline:
       - sed -i 's/keepcache=0/keepcache=1/' /etc/yum.conf
       - curl -s -o /var/cache/yum/epel-release-latest-7.noarch.rpm http://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
       - rpm -i /var/cache/yum/epel-release-latest-7.noarch.rpm
-      # - yum group install -qy "Development Tools"
       - yum install -qy centos-release-scl
       - yum install -qy devtoolset-6
       - scl enable devtoolset-6 bash
-      - yum install -qy libcurl-devel doxygen
+      - yum install -qy libcurl-devel doxygen rpm-build
       - yum --enablerepo=epel install -qy cmake3 jsoncpp-devel
       - curl -s -o /var/cache/yum/curlpp-devel-0.7.3-5.el6.x86_64.rpm https://ftp.wrz.de/pub/fedora-epel/6/x86_64/Packages/c/curlpp-devel-0.7.3-5.el6.x86_64.rpm
       - curl -s -o /var/cache/yum/curlpp-0.7.3-5.el6.x86_64.rpm https://ftp.wrz.de/pub/fedora-epel/6/x86_64/Packages/c/curlpp-0.7.3-5.el6.x86_64.rpm