diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 0eaaa8972..97418eafc 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -42,9 +42,6 @@ npm install:
     - 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; 
-  after_script:
-    - zip -qr node_modules.zip node_modules
-    - du -hs node_modules node_modules.zip
   artifacts:
     paths:
       - node_modules/
@@ -93,11 +90,8 @@ yesod:build:dev:
   before_script: &haskell
     - rm -rvf /etc/apt/sources.list /etc/apt/sources.list.d
     - install -v -T -m 0644 ${APT_SOURCES_LIST} /etc/apt/sources.list
-    - apt-key add ${LLVM_APT_KEY}
     - apt update -y
-    - apt install -y --no-install-recommends locales-all openssh-client llvm-9
-    - ln -vsf llc-9 /usr/bin/llc
-    - ln -vsf opt-9 /usr/bin/opt
+    - apt install -y --no-install-recommends locales-all openssh-client
     - 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; 
@@ -118,7 +112,7 @@ yesod:build:dev:
 yesod:build:
   stage: yesod:build
   script:
-    - stack build --copy-bins --local-bin-path $(pwd)/bin --flag uniworx:-library-only --flag uniworx:-dev --flag uniworx:pedantic
+    - stack build --test --copy-bins --local-bin-path $(pwd)/bin --flag uniworx:-library-only --flag uniworx:-dev --flag uniworx:pedantic
   needs:
     - frontend:build
   before_script: *haskell
@@ -195,52 +189,12 @@ yesod:test:dev:
   retry: 2
   interruptible: true
 
-hlint:
-  stage: lint
-  script:
-    - stack test --flag uniworx:-library-only --flag uniworx:-dev --flag uniworx:pedantic uniworx:test:hlint
-  needs:
-    - frontend:build
-  before_script: *haskell
-  dependencies:
-    - frontend:build
-
-  only:
-    variables:
-      - $CI_COMMIT_REF_NAME =~ /^v[0-9].*/
-  retry: 2
-  interruptible: true
-  resource_group: ram
-
-yesod:test:
-  services:
-    - name: postgres:10.10
-      alias: postgres
-
-  stage: test
-  script:
-    - stack test --coverage --flag uniworx:-library-only --flag uniworx:-dev --flag uniworx:pedantic --skip hlint
-  needs:
-    - frontend:build
-  before_script: *haskell
-  dependencies:
-    - frontend:build
-      
-  only:
-    variables:
-      - $CI_COMMIT_REF_NAME =~ /^v[0-9].*/
-  retry: 2
-  interruptible: true
-  resource_group: ram
-
 deploy:uniworx3:
   stage: deploy
   script:
     - ssh -i ~/.ssh/id root@uniworx3.ifi.lmu.de <bin/uniworx
   needs:
     - yesod:build
-    - yesod:test # For sanity
-    - hlint # For sanity
     - frontend:test # For sanity
   before_script:
     - rm -rvf /etc/apt/sources.list /etc/apt/sources.list.d
diff --git a/package.yaml b/package.yaml
index 53d3b395e..8225b7327 100644
--- a/package.yaml
+++ b/package.yaml
@@ -241,7 +241,7 @@ when:
         - -fprof-auto
     else:
       ghc-options:
-        - -O -fllvm
+        - -O
 
 # The library contains all of our application code. The executable
 # defined below is just a thin wrapper.
diff --git a/stack.yaml b/stack.yaml
index 1ad83175a..f1fa64f1c 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -36,91 +36,8 @@ extra-deps:
       - colonnade
   - git: git@gitlab2.rz.ifi.lmu.de:uni2work/minio-hs.git
     commit: 42103ab247057c04c8ce7a83d9d4c160713a3df1
-    
 
-  # # - colonnade-1.2.0.2
-  # - hsass-0.8.0
-  # - hlibsass-0.1.8.1
-  # - tz-0.1.3.3
-
-  # # - zip-stream-0.2.0.1
-
-  # - uuid-crypto-1.4.0.0
-  # - filepath-crypto-0.1.0.0
-  # - cryptoids-0.5.1.0
-  # - cryptoids-types-1.0.0
-  # - cryptoids-class-0.0.0
-
-  # - system-locale-0.3.0.0
-
-  # - hlint-test-0.1.0.0
-
-  # - pkcs7-1.0.0.1
-
-  # - systemd-2.2.0
-
-  # # - directory-1.3.4.0
-
-  # # - HaXml-1.25.5
-
-  # # - persistent-2.10.4
-  # # - persistent-postgresql-2.10.1
-  # # - persistent-template-2.7.3
-  # # - esqueleto-3.2.3
-
-  # - sandi-0.5
-  # - storable-endian-0.2.6
-  # # - universe-1.2
-  # # - universe-base-1.1.1
-  # # - universe-reverse-instances-1.1
-  # # - unliftio-pool-0.2.1.0
-  # # - universe-instances-extended-1.1.1
-  # # - universe-some-1.2
-  # # - some-1.0.0.3
-
-  # # - network-bsd-2.8.1.0
-
-  # # - persistent-qq-2.9.1
-
-  # # - process-1.6.5.1
-
-  # # - generic-lens-1.2.0.0
-
-  # - prometheus-metrics-ghc-1.0.1
-  # - wai-middleware-prometheus-1.0.0
-
-  # # - extended-reals-0.2.3.0
-
-  # - pandoc-2.9.2
-  # - doclayout-0.3
-  # - doctemplates-0.8.1
-  # # - emojis-0.1
-  # # - hslua-module-system-0.2.1
-  # # - ipynb-0.1
-  # # - jira-wiki-markup-1.0.0
-  # # - HsYAML-0.2.1.0
-  # # - cmark-gfm-0.2.1
-  # # - haddock-library-1.8.0
-  # # - pandoc-types-1.20
-  # # - skylighting-0.8.3.2
-  # # - skylighting-core-0.8.3.2
-  # # - texmath-0.12.0.1
-
-  # - binary-instances-1
-
-  # - acid-state-0.16.0
-
-  # - unidecode-0.1.0.4
-
-  # - token-bucket-0.1.0.1
-
-  # - normaldistribution-1.1.0.3
-
-  # - unordered-containers-0.2.11.0
-
-  # - base64-bytestring-1.1.0.0
-
-  - generic-lens-1.2.0.0
+  - generic-lens-1.2.0.0@sha256:b19e7970c93743a46bc3702331512a96d163de4356472f2d51a2945887aefe8c,6524 # manual downgrade; won't compile with >=2.0.0.0
 
   - acid-state-0.16.0.1@sha256:d43f6ee0b23338758156c500290c4405d769abefeb98e9bc112780dae09ece6f,6207
   - bytebuild-0.3.6.0@sha256:aec785c906db5c7ec730754683196eb99a0d48e0deff7d4034c7b58307040b85,2982