diff --git a/.github/workflows/artifact-links.yml b/.github/workflows/artifact-links.yml
index a1b7ed926d..7de1ad23cc 100644
--- a/.github/workflows/artifact-links.yml
+++ b/.github/workflows/artifact-links.yml
@@ -3,6 +3,7 @@ on:
   workflow_run:
     workflows: ["PR"]
     types: [completed]
+    branches: ['*-maintenance']
 
 jobs:
   artifacts-url-comments:
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 87371c6d8c..52bbe4b4ad 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -39,6 +39,7 @@ jobs:
   build:
     name: Build (${{ matrix.name }})
     needs: test
+    if: ${{ endsWith(github.ref, 'maintenance') }}
     runs-on:  ${{ matrix.os }}
     strategy:
       matrix:
diff --git a/.github/workflows/hide-artifact-links.yml b/.github/workflows/hide-artifact-links.yml
index 3312ee7cc9..fb5622ca90 100644
--- a/.github/workflows/hide-artifact-links.yml
+++ b/.github/workflows/hide-artifact-links.yml
@@ -3,6 +3,7 @@ name: Hide artifact links comments
 on:
   pull_request_target:
     types: [synchronize, reopened]
+    branches: ['*-maintenance']
 
 jobs:
   hide-artifacts-link-comments:
diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index dc5e07d36b..db60fee15c 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -17,6 +17,7 @@ name: Nightly
 on:
   push:
     branches:
+      - master
       - '*-maintenance'
 
 jobs:
@@ -29,6 +30,7 @@ jobs:
   release:
     name: Nightly release
     needs: ci
+    if: ${{ endsWith(github.ref, 'maintenance') }}
     runs-on: ubuntu-22.04
     steps:
       - name: Fetch build artifacts
diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
index 0191192734..2fcdcd4a14 100644
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -3,6 +3,7 @@ name: PR
 on:
   pull_request:
     branches:
+      - master
       - '*-maintenance'
 
 concurrency:
diff --git a/src/js/msp.js b/src/js/msp.js
index 42c214bf92..7db69fb1f4 100644
--- a/src/js/msp.js
+++ b/src/js/msp.js
@@ -1,7 +1,5 @@
 import GUI from "./gui.js";
 import CONFIGURATOR from "./data_storage.js";
-import serialNWJS from "./serial.js";
-import serialWeb from "./webSerial.js";
 import { isWeb } from "./utils/isWeb.js";
 import { serialShim } from "./serial_shim.js";