diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9e8576d7b1b25..1106e186a4cf4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -167,6 +167,7 @@ jobs:
       TOOLSTATE_PUBLISH: 1
       CACHES_AWS_ACCESS_KEY_ID: AKIA46X5W6CZI5DHEBFL
       ARTIFACTS_AWS_ACCESS_KEY_ID: AKIA46X5W6CZN24CBO55
+      AWS_REGION: us-west-1
       CACHE_DOMAIN: ci-caches.rust-lang.org
     if: "github.event_name == 'push' && github.ref == 'refs/heads/auto' && github.repository == 'rust-lang-ci/rust'"
     strategy:
@@ -587,6 +588,7 @@ jobs:
       TOOLSTATE_PUBLISH: 1
       CACHES_AWS_ACCESS_KEY_ID: AKIA46X5W6CZI5DHEBFL
       ARTIFACTS_AWS_ACCESS_KEY_ID: AKIA46X5W6CZN24CBO55
+      AWS_REGION: us-west-1
       CACHE_DOMAIN: ci-caches.rust-lang.org
     if: "github.event_name == 'push' && (github.ref == 'refs/heads/try' || github.ref == 'refs/heads/try-perf') && github.repository == 'rust-lang-ci/rust'"
     strategy:
@@ -697,6 +699,7 @@ jobs:
       TOOLSTATE_PUBLISH: 1
       CACHES_AWS_ACCESS_KEY_ID: AKIA46X5W6CZI5DHEBFL
       ARTIFACTS_AWS_ACCESS_KEY_ID: AKIA46X5W6CZN24CBO55
+      AWS_REGION: us-west-1
       CACHE_DOMAIN: ci-caches.rust-lang.org
     if: "github.event_name == 'push' && github.ref == 'refs/heads/master' && github.repository == 'rust-lang-ci/rust'"
     steps:
diff --git a/src/ci/docker/run.sh b/src/ci/docker/run.sh
index 69d4916e5a963..8bea8cd4c878c 100755
--- a/src/ci/docker/run.sh
+++ b/src/ci/docker/run.sh
@@ -169,6 +169,7 @@ if [ "$SCCACHE_BUCKET" != "" ]; then
     args="$args --env SCCACHE_REGION"
     args="$args --env AWS_ACCESS_KEY_ID"
     args="$args --env AWS_SECRET_ACCESS_KEY"
+    args="$args --env AWS_REGION"
 else
     mkdir -p $HOME/.cache/sccache
     args="$args --env SCCACHE_DIR=/sccache --volume $HOME/.cache/sccache:/sccache"
diff --git a/src/ci/github-actions/ci.yml b/src/ci/github-actions/ci.yml
index 1e28497b146e6..4f965cfd52d2e 100644
--- a/src/ci/github-actions/ci.yml
+++ b/src/ci/github-actions/ci.yml
@@ -53,6 +53,7 @@ x--expand-yaml-anchors--remove:
     # (caches, artifacts...).
     CACHES_AWS_ACCESS_KEY_ID: AKIA46X5W6CZI5DHEBFL
     ARTIFACTS_AWS_ACCESS_KEY_ID: AKIA46X5W6CZN24CBO55
+    AWS_REGION: us-west-1
     CACHE_DOMAIN: ci-caches.rust-lang.org
 
   - &dummy-variables
@@ -68,6 +69,7 @@ x--expand-yaml-anchors--remove:
     # (caches, artifacts...).
     CACHES_AWS_ACCESS_KEY_ID: AKIA46X5W6CZOMUQATD5
     ARTIFACTS_AWS_ACCESS_KEY_ID: AKIA46X5W6CZH5AYXDVF
+    AWS_REGION: us-west-1
     CACHE_DOMAIN: ci-caches-gha.rust-lang.org
 
   - &base-job