diff --git a/Dockerfile b/Dockerfile
index 13191da..959fd32 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,6 +4,7 @@ MAINTAINER Nemo <opml.docker@captnemo.in>
 WORKDIR /app
 
 COPY Gemfile Gemfile.lock /app/
+RUN apk add --no-cache build-base
 RUN bundle install
 COPY . /app
 
diff --git a/README.md b/README.md
index 23ace11..0aee072 100644
--- a/README.md
+++ b/README.md
@@ -5,3 +5,6 @@ Simple web tool to generate OPML files to let you use RSS feeds everywhere
 Currently only support GitHub Starred Repos: It generates an OPML file so you can follow all of your starred repos easily.
 
 I plan to add more OPML generators: GoodReads feed perhaps?
+
+The canonical URL for this project is https://git.captnemo.in/nemo/opml-gen,
+a [mirror](github.com/captn3m0/opml-gen) is maintained on GitHub.