diff --git a/.github/workflows/Build.yml b/.github/workflows/Build.yml
index d0d0a4dcd..33726d2dd 100644
--- a/.github/workflows/Build.yml
+++ b/.github/workflows/Build.yml
@@ -24,7 +24,7 @@ on:
       branch:
         description: "Branch of chromebrew/chromebrew to run on, if different from this branch."
         required: false
-      update_merge_master:
+      update_rebase_to_master:
         description: "Update Branch."
         required: false
         type: boolean
@@ -85,7 +85,7 @@ jobs:
             gh pr ready --undo || true
             # Try to update branch before building if a PR already
             # exists.
-            [[ "${{ ( inputs.update_merge_master ) }}" == 'true' ]] && gh pr update-branch || true
+            [[ "${{ ( inputs.update_rebase_to_master ) }}" == 'true' ]] && gh pr update-branch --rebase || true
           fi
       - name: Set Timestamp
         id: set-timestamp
@@ -306,19 +306,6 @@ jobs:
               grep "Built and Uploaded:" /tmp/build.log || true
               echo "Deleting build output directories."
               sudo rm -rf release pkg_cache
-      - name: Add updated packages to branch.
-        id: push-check
-        run: |
-          if [ -n "$(git status --porcelain)" ]; then
-            git config user.name "${{ github.actor }}"
-            git config user.email "${{ github.actor }}@users.noreply.github.com"
-            git stash || true
-            git pull
-            git stash pop || true
-            git add -A
-            git commit -m "${{ inputs.branch || github.ref_name }}: Build Run on ${PLATFORM}." && git push
-            git log --oneline -10
-          fi
   build-check:
     runs-on: ubuntu-24.04
     needs:
diff --git a/.github/workflows/Generate-PR.yml b/.github/workflows/Generate-PR.yml
index ce7df11da..010ab2c17 100644
--- a/.github/workflows/Generate-PR.yml
+++ b/.github/workflows/Generate-PR.yml
@@ -12,7 +12,7 @@ on:
       pr_title:
         description: "Title of PR"
         required: false
-      update_merge_master:
+      update_rebase_to_master:
         description: "Update Branch."
         required: false
         type: boolean
@@ -79,7 +79,7 @@ jobs:
             echo "Setting ${PR_NUMBER} to Draft while workflow runs."
             gh pr ready --undo || true
           fi
-          if [[ "${{ ( inputs.update_merge_master ) }}" == 'true' ]]; then
+          if [[ "${{ ( inputs.update_rebase_to_master ) }}" == 'true' ]]; then
             if [[ -n ${PR_NUMBER} ]]; then
               # Try to update branch immediately.
               gh pr update-branch || true
@@ -89,7 +89,6 @@ jobs:
               # before continuing.
               gh pr update-branch || true
             fi
-            git pull
           fi
       - name: Get changed files
         id: changed-files
@@ -317,10 +316,10 @@ jobs:
             git config user.name "${{ github.actor }}"
             git config user.email "${{ github.actor }}@users.noreply.github.com"
             git stash || true
-            git pull
+            git fetch origin ${{ inputs.branch || github.ref_name }}
             git stash pop || true
             git add -A
-            git commit -m "${{ inputs.branch || github.ref_name }}: Package File Update Run on ${PLATFORM} container." && git push
+            git commit -m "${{ inputs.branch || github.ref_name }}: Package File Update Run on ${PLATFORM} container." && git push origin ${{ inputs.branch || github.ref_name }}
             git log --oneline -10
           fi
   build-check:
@@ -353,13 +352,26 @@ jobs:
           sudo gem install ruby-libversion
       - name: Save git log
         id: save-git-log
+        env:
+          GH_TOKEN: ${{ secrets.CREW_PR_TOKEN }}
         run: |
-            git config user.name "${{ github.actor }}"
-            git config user.email "${{ github.actor }}@users.noreply.github.com"
-            git checkout master && git pull
-            git checkout "${{ inputs.branch || github.ref_name }}"
-            git log --oneline -10
-            git log --oneline master..${{ inputs.branch || github.ref_name }} | grep -v "Merge branch 'master'\|Build Run on\|Package File Update Run on\|lint$" | tr '\n' '\0' | xargs -0 -n1 echo "- $*" >> /tmp/commits.txt
+          PR_NUMBER=$(gh pr list -L 1 -s open -H ${{ inputs.branch || github.ref_name }} | cut -f1)
+          if [[ -n ${PR_NUMBER} ]]; then
+            # Try to update branch immediately.
+            gh pr update-branch --rebase || true
+          else
+            gh pr create -d -b WIP -t "WIP ${{ inputs.branch || github.ref_name }}"
+            # Create a draft PR and immediately try to update the branch
+            # before continuing.
+            gh pr update-branch --rebase || true
+          fi
+          git config user.name "${{ github.actor }}"
+          git config user.email "${{ github.actor }}@users.noreply.github.com"
+          git checkout master && git fetch origin master
+          git checkout "${{ inputs.branch || github.ref_name }}"
+          # git rebase origin/master || git rebase --abort
+          git log --no-merges --oneline -10
+          git log --no-merges --oneline master..${{ inputs.branch || github.ref_name }} | grep -v "Merge branch 'master'\|Build Run on\|Package File Update Run on\|lint$" | tr '\n' '\0' | xargs -0 -n1 echo "- $*" >> /tmp/commits.txt
       - name: Get changed files
         id: changed-files
         uses: tj-actions/changed-files@v47
@@ -377,7 +389,6 @@ jobs:
               - '!manifest/**'
               - '!packages/*.rb'
               - '!.github/**'
-          since_last_remote_commit: true
       - name: Get GH Token
         id: get_workflow_token
         uses: peter-murray/workflow-application-token-action@v4
@@ -474,7 +485,7 @@ jobs:
             gh pr edit --add-reviewer chromebrew/active $PR_EDIT_LABEL_FLAG --title "$(echo "${PR_TITLE}" | sed -e "s/^'//" -e "s/'$//") ${PKG_DELTAS}" -F /tmp/pr.txt
           fi
           # Try to update branch before finishing.
-          [[ "${{ ( inputs.update_merge_master ) }}" == 'true' ]] && gh pr update-branch || true
+          [[ "${{ ( inputs.update_rebase_to_master ) }}" == 'true' ]] && gh pr update-branch --rebase || true
           # Draft PRs can not be set to automerge.
           if [[ ${DRAFT_PR} == 'true' ]]; then
             gh pr ready --undo || true
diff --git a/.github/workflows/Unit-Test.yml b/.github/workflows/Unit-Test.yml
index 2205c5f48..f56437c6b 100644
--- a/.github/workflows/Unit-Test.yml
+++ b/.github/workflows/Unit-Test.yml
@@ -34,7 +34,7 @@ jobs:
             runner: ubuntu-24.04
     runs-on: ${{ matrix.runner }}
     concurrency:
-      group: ${{ matrix.arch }}-${{ github.workflow }}-${{ github.ref }}
+      group: ${{ matrix.arch }}-${{ github.workflow }}-${{ github.ref }}-${{ github.sha }}
       cancel-in-progress: true
     steps:
       - uses: actions/checkout@v4
diff --git a/.rubocop.yml b/.rubocop.yml
index eadd9e9e6..9420551b6 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -106,7 +106,7 @@ Metrics:
 # Many package names include - or _ and we don't want to lose that information by mistakenly converting into CamelCase.
 Naming/ClassAndModuleCamelCase:
   Exclude:
-    - 'packages/*'
+   - /**/packages/*
 
 # If there is meaningful information to convey about the contents of a heredoc, a comment is the best way to do it.
 # Forcing unique names for all heredoc delimiters does not improve documentation in the vast majority of cases.
diff --git a/packages/py3_pyyaml.rb b/packages/py3_pyyaml.rb
index fc2c6887c..3bff188cf 100644
--- a/packages/py3_pyyaml.rb
+++ b/packages/py3_pyyaml.rb
@@ -17,8 +17,8 @@ class Py3_pyyaml < Pip
   })
 
   depends_on 'glibc' # R
-  depends_on 'libyaml' # R
-  depends_on 'python3' => :build
+  depends_on 'libyaml' => :build
+  depends_on 'python3' # R
 
   no_source_build
 end
diff --git a/tools/getrealdeps.rb b/tools/getrealdeps.rb
index e7bcb2577..c93c7daeb 100755
--- a/tools/getrealdeps.rb
+++ b/tools/getrealdeps.rb
@@ -1,5 +1,5 @@
 #!/usr/local/bin/ruby
-# getrealdeps version 2.2 (for Chromebrew)
+# getrealdeps version 2.3 (for Chromebrew)
 # Author: Satadru Pramanik (satmandu) satadru at gmail dot com
 require 'fileutils'
 
@@ -44,6 +44,8 @@ end
 
 # Write the missing dependencies to the package file.
 def write_deps(pkg_file, pkgdeps, pkg)
+  # pkg is not pkg.name in this function.
+  # e.g., pkg is Package::Py3_pyyaml
   # Add special deps for perl, pip, python, and ruby gem packages.
   case pkg.superclass.to_s
   when 'PERL'
@@ -78,7 +80,7 @@ def write_deps(pkg_file, pkgdeps, pkg)
     puts "#{pkg.name}: #{exception[:exclusion_regex]} - #{exception[:comments]}..".orange if pkgdeps_length != pkgdeps.length
   end
 
-  puts "\nPackage #{pkg} has runtime library dependencies on these packages:".lightblue
+  puts "\nPackage #{pkg.name} has runtime library dependencies on these packages:".lightblue
   pkgdeps.each do |i|
     puts "  depends_on '#{i}' # R".lightgreen
   end
@@ -87,7 +89,7 @@ def write_deps(pkg_file, pkgdeps, pkg)
   missingpkgdeps = pkgdeps.reject { File.read(pkg_file).include?("depends_on '#{it}'") unless File.read(pkg_file).include?("depends_on '#{it}' => :build") }
 
   unless missingpkgdeps.empty?
-    puts "\nPackage file #{pkg}.rb is missing these runtime library dependencies:".orange
+    puts "\nPackage file #{pkg_file} is missing these runtime library dependencies:".orange
     puts "  depends_on '#{missingpkgdeps.join("' # R\n  depends_on '")}' # R".orange
   end
 
@@ -143,10 +145,11 @@ def write_deps(pkg_file, pkgdeps, pkg)
 
   # Clean with rubocop.
   system "rubocop -c #{rubocop_config} -A #{pkg_file}"
-  FileUtils.cp pkg_file, "#{CREW_LOCAL_REPO_ROOT}/packages/#{pkg}.rb" unless CREW_LOCAL_REPO_ROOT.to_s.empty?
+  FileUtils.cp pkg_file, "#{CREW_LOCAL_REPO_ROOT}/packages/#{File.basename(pkg_file)}" unless CREW_LOCAL_REPO_ROOT.to_s.empty?
 end
 
 def main(pkg)
+  # pkg is pkg.name in this function.
   puts "Checking for the runtime dependencies of #{pkg}...".lightblue
   pkg_file = File.join(CREW_PACKAGES_PATH, "#{pkg}.rb")
   FileUtils.cp File.join(CREW_LOCAL_REPO_ROOT, "packages/#{pkg}.rb"), pkg_file if !CREW_LOCAL_REPO_ROOT.to_s.empty? && File.file?(File.join(CREW_LOCAL_REPO_ROOT, "packages/#{pkg}.rb"))