diff --git a/Library/Homebrew/dev-cmd/pr-automerge.rb b/Library/Homebrew/dev-cmd/pr-automerge.rb
index c7aadd8ea1..047a94c503 100644
--- a/Library/Homebrew/dev-cmd/pr-automerge.rb
+++ b/Library/Homebrew/dev-cmd/pr-automerge.rb
@@ -34,7 +34,6 @@ module Homebrew
   def pr_automerge
     pr_automerge_args.parse
 
-    ENV["HOMEBREW_FORCE_HOMEBREW_ON_LINUX"] = "1" unless OS.mac?
     without_labels = Homebrew.args.without_labels || ["do not merge", "new formula"]
     tap = Tap.fetch(Homebrew.args.tap || CoreTap.instance.name)
 
@@ -59,7 +58,7 @@ module Homebrew
     end
 
     if args.publish?
-      safe_system "#{HOMEBREW_PREFIX}/bin/brew", "pr-publish", *pr_urls
+      safe_system HOMEBREW_BREW_FILE, "pr-publish", *pr_urls
     else
       ohai "Now run:", "  brew pr-publish \\\n    #{pr_urls.join " \\\n    "}"
     end
diff --git a/Library/Homebrew/dev-cmd/pr-publish.rb b/Library/Homebrew/dev-cmd/pr-publish.rb
index d45ab8c185..899e2dee64 100644
--- a/Library/Homebrew/dev-cmd/pr-publish.rb
+++ b/Library/Homebrew/dev-cmd/pr-publish.rb
@@ -12,8 +12,10 @@ module Homebrew
         `pr-publish` [<options>] <pull_request> [<pull_request> ...]
 
         Publish bottles for a pull request with GitHub Actions.
-        Requires write access to the `homebrew/core` repository.
+        Requires write access to the repository.
       EOS
+      flag   "--tap=",
+             description: "Target tap repository (default: `homebrew/core`)."
       switch :verbose
       min_named 1
     end
@@ -22,14 +24,13 @@ module Homebrew
   def pr_publish
     pr_publish_args.parse
 
-    ENV["HOMEBREW_FORCE_HOMEBREW_ON_LINUX"] = "1" unless OS.mac?
+    tap = Tap.fetch(Homebrew.args.tap || CoreTap.instance.name)
 
     args.named.uniq.each do |arg|
-      arg = "#{CoreTap.instance.default_remote}/pull/#{arg}" if arg.to_i.positive?
+      arg = "#{tap.default_remote}/pull/#{arg}" if arg.to_i.positive?
       url_match = arg.match HOMEBREW_PULL_OR_COMMIT_URL_REGEX
       _, user, repo, issue = *url_match
       odie "Not a GitHub pull request: #{arg}" unless issue
-      tap = Tap.fetch(user, repo) if repo.match?(HOMEBREW_OFFICIAL_REPO_PREFIXES_REGEX)
       ohai "Dispatching #{tap} pull request ##{issue}"
       GitHub.dispatch_event(user, repo, "Publish ##{issue}", pull_request: issue)
     end
diff --git a/docs/Manpage.md b/docs/Manpage.md
index 2709a17839..56c9b936af 100644
--- a/docs/Manpage.md
+++ b/docs/Manpage.md
@@ -883,7 +883,10 @@ Find pull requests that can be automatically merged using `brew pr-publish`.
 ### `pr-publish` [*`options`*] *`pull_request`* [*`pull_request`* ...]
 
 Publish bottles for a pull request with GitHub Actions. Requires write access to
-the `homebrew/core` repository.
+the repository.
+
+* `--tap`:
+  Target tap repository (default: `homebrew/core`).
 
 ### `pr-pull` [*`options`*] *`pull_request`* [*`pull_request`* ...]
 
diff --git a/manpages/brew.1 b/manpages/brew.1
index a653c4df12..b56adc35ce 100644
--- a/manpages/brew.1
+++ b/manpages/brew.1
@@ -1146,7 +1146,11 @@ Run \fBbrew pr\-publish\fR on matching pull requests\.
 Include pull requests that have failing status checks\.
 .
 .SS "\fBpr\-publish\fR [\fIoptions\fR] \fIpull_request\fR [\fIpull_request\fR \.\.\.]"
-Publish bottles for a pull request with GitHub Actions\. Requires write access to the \fBhomebrew/core\fR repository\.
+Publish bottles for a pull request with GitHub Actions\. Requires write access to the repository\.
+.
+.TP
+\fB\-\-tap\fR
+Target tap repository (default: \fBhomebrew/core\fR)\.
 .
 .SS "\fBpr\-pull\fR [\fIoptions\fR] \fIpull_request\fR [\fIpull_request\fR \.\.\.]"
 Download and publish bottles, and apply the bottle commit from a pull request with artifacts generated by GitHub Actions\. Requires write access to the repository\.