diff --git a/.github/workflows/update-dist.yml b/.github/workflows/update-dist.yml
index 82777dd..8578855 100644
--- a/.github/workflows/update-dist.yml
+++ b/.github/workflows/update-dist.yml
@@ -44,12 +44,12 @@ jobs:
       -
         name: Commit and push dist
         run: |
-          if [ -n "$(git status --porcelain -- dist)" ]; then
+          if [ -n "$(git status --porcelain -- dist subaction/matrix/dist)" ]; then
             (
               set -x
               git config user.name "github-actions[bot]"
               git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
-              git add dist
+              git add dist subaction/matrix/dist
               git commit -m "[dependabot skip] chore: update generated content"
               git push
             )
diff --git a/dev.Dockerfile b/dev.Dockerfile
index 63e7696..418c3d6 100644
--- a/dev.Dockerfile
+++ b/dev.Dockerfile
@@ -40,10 +40,12 @@ RUN --mount=target=/context \
   --mount=type=cache,target=/src/node_modules <<EOT
   set -e
   rsync -a /context/. .
-  rm -rf dist
-  yarn run build
+  rm -rf dist subaction/matrix/dist
+  yarn workspaces foreach --all run build
   mkdir /out
   cp -r dist /out
+  mkdir -p /out/subaction/matrix
+  cp -r subaction/matrix/dist /out/subaction/matrix
 EOT
 
 FROM scratch AS build-update
@@ -55,9 +57,9 @@ RUN --mount=target=/context \
   set -e
   rsync -a /context/. .
   git add -A
-  rm -rf dist
+  rm -rf dist subaction/matrix/dist
   cp -rf /out/* .
-  if [ -n "$(git status --porcelain -- dist)" ]; then
+  if [ -n "$(git status --porcelain -- dist subaction/matrix/dist)" ]; then
     echo >&2 'ERROR: Build result differs. Please build first with "docker buildx bake build"'
     git status --porcelain -- dist
     exit 1