diff --git a/Dockerfile b/Dockerfile
index 8507dbe..c7fa280 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,37 +1,39 @@
-FROM opensuse/leap:15.4
+FROM opensuse/leap:15.6
 
-ENV LANG C.UTF-8
-ENV LC_ALL C.UTF-8
+ENV LANG=C.UTF-8
+ENV LC_ALL=C.UTF-8
 
 # install
-RUN zypper -n ar https://download.opensuse.org/repositories/openSUSE:/Tools/15.4/openSUSE:Tools.repo && \
-    zypper -n ar https://download.opensuse.org/repositories/devel:/languages:/go/15.4/devel:languages:go.repo && \
-    zypper -n ar https://download.opensuse.org/repositories/devel:/languages:/erlang/15.4/devel:languages:erlang.repo && \
-    zypper -n --gpg-auto-import-keys refresh --force --services && \
-    zypper install -y build \
-                      elixir \
-                      go1.18 \
-                      gzip \
-                      helm \
-                      obs-service-obs_scm \
-                      obs-service-obs_scm-common \
-                      obs-service-recompress \
-                      obs-service-set_version \
-                      obs-service-source_validator \
-                      obs-service-verify_file \
-                      obs-service-format_spec_file \
-                      obs-service-tar_scm \
-                      obs-service-download_files \
-                      obs-service-node_modules \
-                      osc \
-                      sudo \
-                      tar \
-                      unzip \
-                      vim \
-                      yq \
-                      wget \
-                      make \
-                      openssh
+RUN <<EOF
+set -ex
+zypper -n ar https://download.opensuse.org/repositories/openSUSE:/Tools/15.6/openSUSE:Tools.repo
+zypper -n ar https://download.opensuse.org/repositories/devel:/sap:/trento:/builddeps/15.6/devel:sap:trento:builddeps.repo
+zypper -n --gpg-auto-import-keys refresh --force --services
+zypper install -y build \
+                  elixir \
+                  go \
+                  gzip \
+                  helm \
+                  obs-service-obs_scm \
+                  obs-service-obs_scm-common \
+                  obs-service-recompress \
+                  obs-service-set_version \
+                  obs-service-source_validator \
+                  obs-service-verify_file \
+                  obs-service-format_spec_file \
+                  obs-service-tar_scm \
+                  obs-service-download_files \
+                  obs-service-node_modules \
+                  osc \
+                  sudo \
+                  tar \
+                  unzip \
+                  vim \
+                  yq \
+                  wget \
+                  make \
+                  openssh
+EOF
 
 ARG USER_NAME=osc
 ARG GROUP_NAME=$USER_NAME
@@ -39,7 +41,7 @@ ARG UID=1000
 ARG GID=1000
 RUN groupadd -g $GID $GROUP_NAME && useradd -m -g $USER_NAME -u $UID $USER_NAME
 USER $USER_NAME
-ENV HOME /home/$USER_NAME
+ENV HOME=/home/$USER_NAME
 WORKDIR $HOME
 
 COPY scripts /scripts