diff --git a/.github/workflows/build-inputs.yml b/.github/workflows/build-inputs.yml
index bb34abb..0f0c01e 100644
--- a/.github/workflows/build-inputs.yml
+++ b/.github/workflows/build-inputs.yml
@@ -40,12 +40,8 @@ on:
         description: 'Kconfig'
         required: false
         default: 'default'
-      zmk:
-        description: 'ZMK'
-        required: false
-        default: 'default'
       merge:
-        description: 'Merge'
+        description: 'ZMK Branches'
         required: false
         default: 'default'
 jobs:
@@ -61,7 +57,6 @@ jobs:
       mapping: ${{ steps.process-inputs.outputs.mapping }}
       config: ${{ steps.process-inputs.outputs.config }}
       kconfig: ${{ steps.process-inputs.outputs.kconfig }}
-      zmk: ${{ steps.process-inputs.outputs.zmk }}
       merge: ${{ steps.process-inputs.outputs.merge }}
     steps:
       - name: Process inputs
@@ -81,7 +76,6 @@ jobs:
           set-output "mapping" "${{ github.event.inputs.mapping }}"
           set-output "config" "${{ github.event.inputs.config }}"
           set-output "kconfig" "${{ github.event.inputs.kconfig }}"
-          set-output "zmk" "${{ github.event.inputs.zmk }}"
           set-output "merge" "${{ github.event.inputs.merge }}"
   build:
     uses: manna-harbour/zmk-config/.github/workflows/main.yml@31a649e5571b4572d7010561dd3f191922cd9410
@@ -96,5 +90,4 @@ jobs:
       mapping: ${{ needs.process-inputs.outputs.mapping }}
       config: ${{ needs.process-inputs.outputs.config }}
       kconfig: ${{ needs.process-inputs.outputs.kconfig }}
-      zmk: ${{ needs.process-inputs.outputs.zmk }}
       merge: ${{ needs.process-inputs.outputs.merge }}
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ba3383e..fbadaf3 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -32,9 +32,6 @@ on:
       kconfig:
         type: string
         default: '["default"]'
-      zmk:
-        type: string
-        default: '["default"]'
       merge:
         type: string
         default: '["default"]'
@@ -56,7 +53,6 @@ jobs:
         mapping: ${{ fromJSON(inputs.mapping) }}
         config: ${{ fromJSON(inputs.config) }}
         kconfig: ${{ fromJSON(inputs.kconfig) }}
-        zmk: ${{ fromJSON(inputs.zmk) }}
         merge: ${{ fromJSON(inputs.merge) }}
     steps:
       - name: Checkout
@@ -119,7 +115,18 @@ jobs:
           if [ -n "${{ matrix.merge }}" -a "${{ matrix.merge }}" != 'default' ]
           then
             artifact_build_name="$artifact_build_name merge_"`echo "${{ matrix.merge }}" | md5sum | cut -d ' ' -f 1`
+            for branch in ${{ matrix.merge }}
+            do
+              if [ `echo "$branch" | cut -c1` = '=' ]
+              then
+                zmk=`echo "$branch" | cut -c2-`
+              else
+                merge="$merge $branch"
+              fi
+            done
           fi
+          echo "::set-output name=merge::$merge"
+          echo "::set-output name=zmk::$zmk"
 
           outboard_dir=".github/workflows/outboards"
           if [ -n "$shield" ]
@@ -166,12 +173,12 @@ jobs:
         run: |
           cp ${{ steps.variables.outputs.outboard_chekout_dir }}/${{ env.outboard_manifest }} config/west.yml
           cat config/west.yml
-      - name: Generate manifest from zmk field
-        if: ${{ matrix.zmk != '' && matrix.zmk != 'default' }}
+      - name: Generate manifest from merge field
+        if: ${{ steps.variables.outputs.zmk != '' }}
         run: |
-          user=`echo ${{ matrix.zmk }} | cut -f 1 -d '/'`
-          repo=`echo ${{ matrix.zmk }} | cut -f 2 -d '/'`
-          branch=`echo ${{ matrix.zmk }} | cut -f 3- -d '/'`
+          user=`echo ${{ steps.variables.outputs.zmk }} | cut -f 1 -d '/'`
+          repo=`echo ${{ steps.variables.outputs.zmk }} | cut -f 2 -d '/'`
+          branch=`echo ${{ steps.variables.outputs.zmk }} | cut -f 3- -d '/'`
           remote="$user-$repo"
           echo "manifest:\n  remotes:\n    - name: $remote\n      url-base: https://github.com/$user\n  projects:\n    - name: zmk\n      remote: $remote\n      repo-path: $repo\n      revision: $branch\n      import: app/west.yml\n  self:\n    path: config" > config/west.yml
           cat config/west.yml
@@ -193,12 +200,12 @@ jobs:
       - name: Update west projects
         run: west update
       - name: Merge branches and update
-        if: ${{ matrix.merge != '' && matrix.merge != 'default' }}
+        if: ${{ steps.variables.outputs.merge != '' }}
         run: |
           cd zmk
           git config user.name "${GITHUB_ACTOR}"
           git config user.email "${GITHUB_ACTOR}@users.noreply.github.com"
-          for merge in ${{ matrix.merge }}
+          for merge in ${{ steps.variables.outputs.merge }}
           do
             user=`echo "$merge" | cut -f 1 -d '/'`
             repo=`echo "$merge" | cut -f 2 -d '/'`
diff --git a/readme.org b/readme.org
index 78a97be..ef21359 100644
--- a/readme.org
+++ b/readme.org
@@ -139,14 +139,15 @@ Appends to the [[#config-file][config]] file.  Join multiple lines with ~\n~.  F
 Appends to [[#kconfig-configuration][Kconfig configuration]].  Join multiple lines with ~\n~.  For no additonal config, leave as ~default~.
 
 
-****** ZMK Fork / zmk
+****** ZMK Branches / merge
 
-Used to build from an alternative ZMK fork.  The branch is specified as ~<user>/<repo>/<branch>~.  For the default ZMK branch, leave as ~default~.
+Used to select an alternative ZMK branch for building, and to merge branches into ZMK at build time.
 
+An alternative ZMK branch for building is specified as ~=<user>/<repo>/<branch>~, i.e. with a leading ~=~.  E.g. the default ZMK branch would be specified as ~=zmkfirmware/zmk/main~.
 
-****** Merge ZMK Branches / merge
+Branches for merging are specified as ~<user>/<repo>/<branch>~, i.e. with no leading ~=~.  E.g. the default ZMK branch would be specified as ~zmkfirmware/zmk/main~.
 
-Used to merge branches into ZMK at build time.  Branches are specified as ~<user>/<repo>/<branch>~.  To merge multiple branches, separate with space.  For no merges, leave as ~default~.
+To specify multiple branches, separate with space.  For no changes, leave as ~default~.
 
 
 ** Supported Keyboards