diff --git a/.github/workflows/check-cherry-picks.yml b/.github/workflows/check-cherry-picks.yml
index 84ed5604443d..b7d914caffdc 100644
--- a/.github/workflows/check-cherry-picks.yml
+++ b/.github/workflows/check-cherry-picks.yml
@@ -10,6 +10,10 @@ on:
       - 'staging-**'
       - '!staging-next'
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 permissions:
   pull-requests: write
 
diff --git a/.github/workflows/check-format.yml b/.github/workflows/check-format.yml
index 4216c6bd1c70..0d2ed9d0b967 100644
--- a/.github/workflows/check-format.yml
+++ b/.github/workflows/check-format.yml
@@ -6,6 +6,10 @@ on:
       - .github/workflows/check-format.yml
   pull_request_target:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 permissions: {}
 
 jobs:
diff --git a/.github/workflows/check-shell.yml b/.github/workflows/check-shell.yml
index 014b60a492fa..b8cbe062b6a9 100644
--- a/.github/workflows/check-shell.yml
+++ b/.github/workflows/check-shell.yml
@@ -9,6 +9,10 @@ on:
       - 'shell.nix'
       - 'ci/**'
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 permissions: {}
 
 jobs:
diff --git a/.github/workflows/codeowners-v2.yml b/.github/workflows/codeowners-v2.yml
index e858615c0828..5c6b0b8da4c6 100644
--- a/.github/workflows/codeowners-v2.yml
+++ b/.github/workflows/codeowners-v2.yml
@@ -29,6 +29,10 @@ on:
   pull_request_target:
     types: [opened, ready_for_review, synchronize, reopened]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 permissions: {}
 
 env:
diff --git a/.github/workflows/edited.yml b/.github/workflows/edited.yml
index b1fc5b11db84..5d93f5b8ce18 100644
--- a/.github/workflows/edited.yml
+++ b/.github/workflows/edited.yml
@@ -16,6 +16,10 @@ on:
   pull_request_target:
     types: [edited]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 permissions: {}
 
 jobs:
diff --git a/.github/workflows/eval-aliases.yml b/.github/workflows/eval-aliases.yml
index 892dfe79907b..2d0a156a8cdf 100644
--- a/.github/workflows/eval-aliases.yml
+++ b/.github/workflows/eval-aliases.yml
@@ -6,6 +6,10 @@ on:
       - .github/workflows/eval-aliases.yml
   pull_request_target:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 permissions: {}
 
 jobs:
diff --git a/.github/workflows/eval.yml b/.github/workflows/eval.yml
index b411ca213923..40a60bbfe025 100644
--- a/.github/workflows/eval.yml
+++ b/.github/workflows/eval.yml
@@ -16,6 +16,10 @@ on:
       - haskell-updates
       - python-updates
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 permissions: {}
 
 jobs:
@@ -290,3 +294,5 @@ jobs:
     if: needs.prepare.outputs.targetSha
     uses: ./.github/workflows/reviewers.yml
     secrets: inherit
+    with:
+      caller: ${{ github.workflow }}
diff --git a/.github/workflows/labels.yml b/.github/workflows/labels.yml
index 1fab6eba3977..5cdec70b62ce 100644
--- a/.github/workflows/labels.yml
+++ b/.github/workflows/labels.yml
@@ -8,6 +8,10 @@ name: "Label PR"
 on:
   pull_request_target:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 permissions:
   contents: read
   issues: write # needed to create *new* labels
diff --git a/.github/workflows/lib-tests.yml b/.github/workflows/lib-tests.yml
index c147d0084123..d176a76411f8 100644
--- a/.github/workflows/lib-tests.yml
+++ b/.github/workflows/lib-tests.yml
@@ -9,6 +9,10 @@ on:
       - 'lib/**'
       - 'maintainers/**'
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 permissions: {}
 
 jobs:
diff --git a/.github/workflows/manual-nixos-v2.yml b/.github/workflows/manual-nixos-v2.yml
index 640cb605433c..e76251838665 100644
--- a/.github/workflows/manual-nixos-v2.yml
+++ b/.github/workflows/manual-nixos-v2.yml
@@ -18,6 +18,10 @@ on:
       # Since the lib functions are used to 'massage' the options before producing the manual
       - "lib/**"
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 permissions: {}
 
 jobs:
diff --git a/.github/workflows/manual-nixpkgs-v2.yml b/.github/workflows/manual-nixpkgs-v2.yml
index c6af1f14b34e..d685cc8994d8 100644
--- a/.github/workflows/manual-nixpkgs-v2.yml
+++ b/.github/workflows/manual-nixpkgs-v2.yml
@@ -10,6 +10,10 @@ on:
       - 'lib/**'
       - 'pkgs/by-name/ni/nixdoc/**'
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 permissions: {}
 
 jobs:
diff --git a/.github/workflows/nix-parse-v2.yml b/.github/workflows/nix-parse-v2.yml
index f75a46957f5a..fa3ae5c2ac1a 100644
--- a/.github/workflows/nix-parse-v2.yml
+++ b/.github/workflows/nix-parse-v2.yml
@@ -6,6 +6,10 @@ on:
       - .github/workflows/nix-parse-v2.yml
   pull_request_target:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 permissions: {}
 
 jobs:
diff --git a/.github/workflows/nixpkgs-vet.yml b/.github/workflows/nixpkgs-vet.yml
index e4fd7aa06c92..bc99e7333520 100644
--- a/.github/workflows/nixpkgs-vet.yml
+++ b/.github/workflows/nixpkgs-vet.yml
@@ -11,6 +11,10 @@ on:
       - .github/workflows/nixpkgs-vet.yml
   pull_request_target:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 permissions: {}
 
 # We don't use a concurrency group here, because the action is triggered quite often (due to the PR edit trigger), and contributors would get notified on any canceled run.
diff --git a/.github/workflows/reviewers.yml b/.github/workflows/reviewers.yml
index 62c8f242164b..884cd2b266a6 100644
--- a/.github/workflows/reviewers.yml
+++ b/.github/workflows/reviewers.yml
@@ -10,6 +10,15 @@ on:
   pull_request_target:
     types: [ready_for_review]
   workflow_call:
+    inputs:
+      caller:
+        description: Name of the calling workflow.
+        required: true
+        type: string
+
+concurrency:
+  group: ${{ inputs.caller }}-${{ github.workflow }}-${{ github.event_name }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
 
 permissions: {}