diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 093e870ae..b2c0aa9b7 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: 2022-2023 Sarah Vaupel <sarah.vaupel@uniworx.de>, Gregor Kleen <gregor.kleen@math.lmu.de>
+# SPDX-FileCopyrightText: 2022-2023 Sarah Vaupel <sarah.vaupel@uniworx.de>, Gregor Kleen <gregor@kleen.consulting>
 #
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
@@ -10,14 +10,18 @@ workflow:
 
 default:
   image:
-    name: registry.uniworx.de/fradrive/fradrive/nix-unstable:0.2.0
+    name: registry.uniworx.de/uniworx/containers/nix-attic:latest
 
 variables:
   NIX_PATH: "nixpkgs=http://nixos.org/channels/nixos-21.05/nixexprs.tar.xz"
   AWS_SHARED_CREDENTIALS_FILE: "/etc/aws/credentials"
 
   TRANSFER_METER_FREQUENCY: "2s"
-  
+
+  NIX_CONFIG: |-
+    extra-substituters = https://cache.iog.io
+    extra-trusted-public-keys = hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ=
+
 stages:
   - frontend:build
   - backend:build
@@ -25,7 +29,7 @@ stages:
   - docker
   - prepare release
   - release
-  
+
 node dependencies:
   stage: frontend:build
   script:
@@ -33,12 +37,10 @@ node dependencies:
     - nix -L build -o result "${FLAKE}#uniworxNodeDependencies"
     - nix-store --export $(nix-store -qR result) | xz -T0 -2 > node-dependencies.nar.xz
   before_script: &nix-before
-    - mkdir -p /etc/nix
-    - install -m 0644 .gitlab-ci/nix.conf /etc/nix/nix.conf
     - git config --global init.defaultBranch master
     - install -v -m 0700 -d ~/.ssh
     - install -v -T -m 0644 "${SSH_KNOWN_HOSTS}" ~/.ssh/known_hosts
-    - install -v -T -m 0400 "${SSH_DEPLOY_KEY}" ~/.ssh/deploy && echo "IdentityFile ~/.ssh/deploy" >> ~/.ssh/config; 
+    - install -v -T -m 0400 "${SSH_DEPLOY_KEY}" ~/.ssh/deploy && echo "IdentityFile ~/.ssh/deploy" >> ~/.ssh/config;
     - install -v -T -m 0644 "${FONTAWESOME_NPM_AUTH_FILE}" /etc/fontawesome-token
     - install -v -T -m 0644 "${NIX_NETRC}" /etc/nix/netrc
     - |
diff --git a/.gitlab-ci/nix-bootstrap.conf b/.gitlab-ci/nix-bootstrap.conf
deleted file mode 100644
index 161508eed..000000000
--- a/.gitlab-ci/nix-bootstrap.conf
+++ /dev/null
@@ -1,5 +0,0 @@
-sandbox = true
-experimental-features = nix-command flakes
-substituters = https://cache.iog.io https://cache.nixos.org/
-trusted-public-keys = hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ= cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=
-require-sigs = true
\ No newline at end of file
diff --git a/.gitlab-ci/nix-bootstrap.conf.license b/.gitlab-ci/nix-bootstrap.conf.license
deleted file mode 100644
index 0544bf968..000000000
--- a/.gitlab-ci/nix-bootstrap.conf.license
+++ /dev/null
@@ -1,3 +0,0 @@
-SPDX-FileCopyrightText: 2022 Gregor Kleen <gregor.kleen@ifi.lmu.de>
-
-SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/.gitlab-ci/nix.conf b/.gitlab-ci/nix.conf
deleted file mode 100644
index f1fc3be60..000000000
--- a/.gitlab-ci/nix.conf
+++ /dev/null
@@ -1,2 +0,0 @@
-sandbox = true
-experimental-features = nix-command flakes
diff --git a/.gitlab-ci/nix.conf.license b/.gitlab-ci/nix.conf.license
deleted file mode 100644
index 0544bf968..000000000
--- a/.gitlab-ci/nix.conf.license
+++ /dev/null
@@ -1,3 +0,0 @@
-SPDX-FileCopyrightText: 2022 Gregor Kleen <gregor.kleen@ifi.lmu.de>
-
-SPDX-License-Identifier: AGPL-3.0-or-later