diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c1a250588310..b3d6d0badf8a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -63,6 +63,11 @@ jobs:
         with:
           github_token: "${{ secrets.github_token }}"
         if: "success() && !env.SKIP_JOB && github.ref != 'refs/heads/try'"
+      - name: configure the PR in which the error message will be posted
+        run: "echo \"[CI_PR_NUMBER=$num]\""
+        env:
+          num: "${{ github.event.number }}"
+        if: "success() && !env.SKIP_JOBS && github.event_name == 'pull_request'"
       - name: add extra environment variables
         run: src/ci/scripts/setup-environment.sh
         env:
@@ -162,6 +167,11 @@ jobs:
         with:
           github_token: "${{ secrets.github_token }}"
         if: "success() && !env.SKIP_JOB && github.ref != 'refs/heads/try'"
+      - name: configure the PR in which the error message will be posted
+        run: "echo \"[CI_PR_NUMBER=$num]\""
+        env:
+          num: "${{ github.event.number }}"
+        if: "success() && !env.SKIP_JOBS && github.event_name == 'pull_request'"
       - name: add extra environment variables
         run: src/ci/scripts/setup-environment.sh
         env:
@@ -473,6 +483,11 @@ jobs:
         with:
           github_token: "${{ secrets.github_token }}"
         if: "success() && !env.SKIP_JOB && github.ref != 'refs/heads/try'"
+      - name: configure the PR in which the error message will be posted
+        run: "echo \"[CI_PR_NUMBER=$num]\""
+        env:
+          num: "${{ github.event.number }}"
+        if: "success() && !env.SKIP_JOBS && github.event_name == 'pull_request'"
       - name: add extra environment variables
         run: src/ci/scripts/setup-environment.sh
         env:
@@ -598,6 +613,11 @@ jobs:
         with:
           github_token: "${{ secrets.github_token }}"
         if: "success() && !env.SKIP_JOB && github.ref != 'refs/heads/try'"
+      - name: configure the PR in which the error message will be posted
+        run: "echo \"[CI_PR_NUMBER=$num]\""
+        env:
+          num: "${{ github.event.number }}"
+        if: "success() && !env.SKIP_JOBS && github.event_name == 'pull_request'"
       - name: add extra environment variables
         run: src/ci/scripts/setup-environment.sh
         env:
diff --git a/src/ci/github-actions/ci.yml b/src/ci/github-actions/ci.yml
index 978a0c56eb67..5db94b56e504 100644
--- a/src/ci/github-actions/ci.yml
+++ b/src/ci/github-actions/ci.yml
@@ -92,6 +92,15 @@ x--expand-yaml-anchors--remove:
         if: success() && !env.SKIP_JOB && github.ref != 'refs/heads/try'
         <<: *step
 
+      # Rust Log Analyzer can't currently detect the PR number of a GitHub
+      # Actions build on its own, so a hint in the log message is needed to
+      # point it in the right direction.
+      - name: configure the PR in which the error message will be posted
+        run: echo "[CI_PR_NUMBER=$num]"
+        env:
+          num: ${{ github.event.number }}
+        if: success() && !env.SKIP_JOBS && github.event_name == 'pull_request'
+
       - name: add extra environment variables
         run: src/ci/scripts/setup-environment.sh
         env: