diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index 013a740..0f14800 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -1,10 +1,12 @@
 # Workflow derived from https://github.com/r-lib/actions/tree/v2/examples
-# Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
+# JAGS variant: installs JAGS on macOS and Windows (Linux gets it via setup-r-dependencies
+# system requirements). Use for packages that depend on rjags/runjags/jagsUI/R2jags.
 on:
   push:
     branches: [main, master]
   pull_request:
     branches: [main, master]
+
 name: R-CMD-check
 
 permissions: read-all
@@ -20,14 +22,10 @@ jobs:
       matrix:
         config:
           - {os: macos-latest,   r: 'release'}
-
           - {os: windows-latest, r: 'release'}
-          # use 4.0 or 4.1 to check with rtools40's older compiler
-          - {os: windows-latest, r: 'oldrel-4'}
-
-          - {os: ubuntu-latest,  r: 'devel', http-user-agent: 'release'}
-          - {os: ubuntu-latest,  r: 'release'}
-          - {os: ubuntu-latest,  r: 'oldrel-1'}
+          - {os: ubuntu-latest,   r: 'devel', http-user-agent: 'release'}
+          - {os: ubuntu-latest,   r: 'release'}
+          - {os: ubuntu-latest,   r: 'oldrel-1'}
 
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
@@ -38,6 +36,23 @@ jobs:
 
       - uses: r-lib/actions/setup-pandoc@v2
 
+      - name: Install JAGS (macOS)
+        if: runner.os == 'macOS'
+        run: |
+          curl -o wjags.pkg -L0 -k --url https://downloads.sourceforge.net/project/mcmc-jags/JAGS/4.x/Mac%20OS%20X/JAGS-4.3.2.pkg
+          sudo installer -pkg wjags.pkg -target /
+          rm wjags.pkg
+
+      - name: Download JAGS (Windows)
+        if: runner.os == 'Windows'
+        run: (New-Object System.Net.WebClient).DownloadFile('https://github.com/poissonconsulting/jags-win/raw/main/JAGS-4.3.1.exe', 'C:\JAGS-4.3.1.exe')
+        shell: powershell
+
+      - name: Install JAGS (Windows)
+        if: runner.os == 'Windows'
+        run: C:\JAGS-4.3.1.exe /S
+        shell: cmd
+
       - uses: r-lib/actions/setup-r@v2
         with:
           r-version: ${{ matrix.config.r }}
diff --git a/.github/workflows/rhub.yaml b/.github/workflows/rhub.yaml
deleted file mode 100644
index 74ec7b0..0000000
--- a/.github/workflows/rhub.yaml
+++ /dev/null
@@ -1,95 +0,0 @@
-# R-hub's generic GitHub Actions workflow file. It's canonical location is at
-# https://github.com/r-hub/actions/blob/v1/workflows/rhub.yaml
-# You can update this file to a newer version using the rhub2 package:
-#
-# rhub::rhub_setup()
-#
-# It is unlikely that you need to modify this file manually.
-
-name: R-hub
-run-name: "${{ github.event.inputs.id }}: ${{ github.event.inputs.name || format('Manually run by {0}', github.triggering_actor) }}"
-
-on:
-  workflow_dispatch:
-    inputs:
-      config:
-        description: 'A comma separated list of R-hub platforms to use.'
-        type: string
-        default: 'linux,windows,macos'
-      name:
-        description: 'Run name. You can leave this empty now.'
-        type: string
-      id:
-        description: 'Unique ID. You can leave this empty now.'
-        type: string
-
-jobs:
-
-  setup:
-    runs-on: ubuntu-latest
-    outputs:
-      containers: ${{ steps.rhub-setup.outputs.containers }}
-      platforms: ${{ steps.rhub-setup.outputs.platforms }}
-
-    steps:
-    # NO NEED TO CHECKOUT HERE
-    - uses: r-hub/actions/setup@v1
-      with:
-        config: ${{ github.event.inputs.config }}
-      id: rhub-setup
-
-  linux-containers:
-    needs: setup
-    if: ${{ needs.setup.outputs.containers != '[]' }}
-    runs-on: ubuntu-latest
-    name: ${{ matrix.config.label }}
-    strategy:
-      fail-fast: false
-      matrix:
-        config: ${{ fromJson(needs.setup.outputs.containers) }}
-    container:
-      image: ${{ matrix.config.container }}
-
-    steps:
-      - uses: r-hub/actions/checkout@v1
-      - uses: r-hub/actions/platform-info@v1
-        with:
-          token: ${{ secrets.RHUB_TOKEN }}
-          job-config: ${{ matrix.config.job-config }}
-      - uses: r-hub/actions/setup-deps@v1
-        with:
-          token: ${{ secrets.RHUB_TOKEN }}
-          job-config: ${{ matrix.config.job-config }}
-      - uses: r-hub/actions/run-check@v1
-        with:
-          token: ${{ secrets.RHUB_TOKEN }}
-          job-config: ${{ matrix.config.job-config }}
-
-  other-platforms:
-    needs: setup
-    if: ${{ needs.setup.outputs.platforms != '[]' }}
-    runs-on: ${{ matrix.config.os }}
-    name: ${{ matrix.config.label }}
-    strategy:
-      fail-fast: false
-      matrix:
-        config: ${{ fromJson(needs.setup.outputs.platforms) }}
-
-    steps:
-      - uses: r-hub/actions/checkout@v1
-      - uses: r-hub/actions/setup-r@v1
-        with:
-          job-config: ${{ matrix.config.job-config }}
-          token: ${{ secrets.RHUB_TOKEN }}
-      - uses: r-hub/actions/platform-info@v1
-        with:
-          token: ${{ secrets.RHUB_TOKEN }}
-          job-config: ${{ matrix.config.job-config }}
-      - uses: r-hub/actions/setup-deps@v1
-        with:
-          job-config: ${{ matrix.config.job-config }}
-          token: ${{ secrets.RHUB_TOKEN }}
-      - uses: r-hub/actions/run-check@v1
-        with:
-          job-config: ${{ matrix.config.job-config }}
-          token: ${{ secrets.RHUB_TOKEN }}
diff --git a/.github/workflows/test-coverage.yaml b/.github/workflows/test-coverage.yaml
index fefc52e..9882260 100644
--- a/.github/workflows/test-coverage.yaml
+++ b/.github/workflows/test-coverage.yaml
@@ -6,7 +6,7 @@ on:
   pull_request:
     branches: [main, master]
 
-name: test-coverage
+name: test-coverage.yaml
 
 permissions: read-all