diff --git a/.gitlab/ci/pipelines/before_merging.yml b/.gitlab/ci/pipelines/before_merging.yml
index a01cd0cd231f3f347709707d9d1211065fe92ddc..010e7f6a282d01735a83ae597b557af67b28f50a 100644
--- a/.gitlab/ci/pipelines/before_merging.yml
+++ b/.gitlab/ci/pipelines/before_merging.yml
@@ -2507,15 +2507,7 @@ ocaml-check:
   - oc.docker:ci:amd64
   timeout: 60 minutes
   cache:
-  - key: cargo-$CI_JOB_NAME_SLUG
-    paths:
-    - $CI_PROJECT_DIR/.cargo/registry/cache
-    policy: pull-push
-  - key: sccache-$CI_JOB_NAME_SLUG
-    paths:
-    - $CI_PROJECT_DIR/_sccache
-    policy: pull-push
-  - key: dune_cache-$CI_JOB_NAME_SLUG
+    key: dune_cache-$CI_JOB_NAME_SLUG
     paths:
     - $CI_PROJECT_DIR/_dune_cache
     policy: pull-push
@@ -2524,17 +2516,12 @@ ocaml-check:
   - ./scripts/ci/take_ownership.sh
   - . ./scripts/version.sh
   - eval $(opam env)
-  - . ./scripts/ci/sccache-start.sh
   script:
   - dune build @check --stop-on-first-error
   after_script:
-  - ./scripts/ci/sccache-stop.sh
   - eval $(opam env)
-  - dune cache trim --size=5GB
+  - dune cache trim --size=3GB
   variables:
-    CARGO_NET_OFFLINE: "false"
-    SCCACHE_DIR: $CI_PROJECT_DIR/_sccache
-    SCCACHE_CACHE_SIZE: 5G
     DUNE_CACHE: enabled
     DUNE_CACHE_STORAGE_MODE: hardlink
     DUNE_CACHE_ROOT: $CI_PROJECT_DIR/_dune_cache
diff --git a/.gitlab/ci/pipelines/merge_train.yml b/.gitlab/ci/pipelines/merge_train.yml
index f0939aecabf256181853512b65c8b2521799999a..3fcf9f2dd7477f26e86ffa33eb273b6f6bdc3473 100644
--- a/.gitlab/ci/pipelines/merge_train.yml
+++ b/.gitlab/ci/pipelines/merge_train.yml
@@ -2506,15 +2506,7 @@ ocaml-check:
   - oc.docker:ci:amd64
   timeout: 60 minutes
   cache:
-  - key: cargo-$CI_JOB_NAME_SLUG
-    paths:
-    - $CI_PROJECT_DIR/.cargo/registry/cache
-    policy: pull-push
-  - key: sccache-$CI_JOB_NAME_SLUG
-    paths:
-    - $CI_PROJECT_DIR/_sccache
-    policy: pull-push
-  - key: dune_cache-$CI_JOB_NAME_SLUG
+    key: dune_cache-$CI_JOB_NAME_SLUG
     paths:
     - $CI_PROJECT_DIR/_dune_cache
     policy: pull-push
@@ -2523,17 +2515,12 @@ ocaml-check:
   - ./scripts/ci/take_ownership.sh
   - . ./scripts/version.sh
   - eval $(opam env)
-  - . ./scripts/ci/sccache-start.sh
   script:
   - dune build @check --stop-on-first-error
   after_script:
-  - ./scripts/ci/sccache-stop.sh
   - eval $(opam env)
-  - dune cache trim --size=5GB
+  - dune cache trim --size=3GB
   variables:
-    CARGO_NET_OFFLINE: "false"
-    SCCACHE_DIR: $CI_PROJECT_DIR/_sccache
-    SCCACHE_CACHE_SIZE: 5G
     DUNE_CACHE: enabled
     DUNE_CACHE_STORAGE_MODE: hardlink
     DUNE_CACHE_ROOT: $CI_PROJECT_DIR/_dune_cache
diff --git a/.gitlab/ci/pipelines/schedule_extended_test.yml b/.gitlab/ci/pipelines/schedule_extended_test.yml
index 3363be2668b26d2bb582068735594069d822d0f5..7e37368397264985141855591c7fb5f60cc1f367 100644
--- a/.gitlab/ci/pipelines/schedule_extended_test.yml
+++ b/.gitlab/ci/pipelines/schedule_extended_test.yml
@@ -2496,15 +2496,7 @@ ocaml-check:
   - oc.docker:ci:amd64
   timeout: 60 minutes
   cache:
-  - key: cargo-$CI_JOB_NAME_SLUG
-    paths:
-    - $CI_PROJECT_DIR/.cargo/registry/cache
-    policy: pull-push
-  - key: sccache-$CI_JOB_NAME_SLUG
-    paths:
-    - $CI_PROJECT_DIR/_sccache
-    policy: pull-push
-  - key: dune_cache-$CI_JOB_NAME_SLUG
+    key: dune_cache-$CI_JOB_NAME_SLUG
     paths:
     - $CI_PROJECT_DIR/_dune_cache
     policy: pull-push
@@ -2514,17 +2506,12 @@ ocaml-check:
   - ./scripts/ci/take_ownership.sh
   - . ./scripts/version.sh
   - eval $(opam env)
-  - . ./scripts/ci/sccache-start.sh
   script:
   - dune build @check --stop-on-first-error
   after_script:
-  - ./scripts/ci/sccache-stop.sh
   - eval $(opam env)
-  - dune cache trim --size=5GB
+  - dune cache trim --size=3GB
   variables:
-    CARGO_NET_OFFLINE: "false"
-    SCCACHE_DIR: $CI_PROJECT_DIR/_sccache
-    SCCACHE_CACHE_SIZE: 5G
     DUNE_CACHE: enabled
     DUNE_CACHE_STORAGE_MODE: hardlink
     DUNE_CACHE_ROOT: $CI_PROJECT_DIR/_dune_cache
diff --git a/ci/bin/code_verification.ml b/ci/bin/code_verification.ml
index f504082fbac312e668c216726c7d6113e4767e47..9503fd2a43e43d7348bd47cdd4556c5c1f64f283 100644
--- a/ci/bin/code_verification.ml
+++ b/ci/bin/code_verification.ml
@@ -933,7 +933,7 @@ let jobs pipeline_type =
            the log and to reduce time to merge of other MRs further
            down the merge train. *)
         ["dune build @check --stop-on-first-error"]
-      |> enable_cargo_cache |> enable_sccache |> enable_dune_cache
+      |> enable_dune_cache ~cache_size:"3GB"
     in
     (* This job triggers the debian child pipeline automatically if any
        files in the changeset is modified. It's the same as