diff --git a/dockerfiles/rhel9-kuma/Dockerfile b/dockerfiles/rhel9-kuma/Dockerfile
index e120d5c882fa0ca9f31eae8d6ccd743d29d633c5..5ce577fa1642e3c3f5d62e6bbb380df7135d42d8 100644
--- a/dockerfiles/rhel9-kuma/Dockerfile
+++ b/dockerfiles/rhel9-kuma/Dockerfile
@@ -4,11 +4,13 @@ FROM registry.c4science.ch/scitas-stack/rhel9-base:9.0
 #dnf group install "Development Tools"
 #dnf install curl findutils gcc-gfortran gnupg2 hostname iproute redhat-lsb-core python3 python3-pip python3-setuptools unzip python3-boto3
 
+# zlib-devel needed to compiler gcc ?
+
 # spack dependencies
 RUN yum install -y \
     gcc-g++ gcc-gfortran \
     patchelf findutils patch \
-    xz bzip2 file gnupg2 hostname iproute unzip\
+    xz bzip2 file gnupg2 hostname iproute unzip zlib-devel\
     python3 python3-pip python3-setuptools python3-boto3 \
     git subversion mercurial \
     glibc-gconv-extra \