diff --git a/Dockerfile b/Dockerfile
index 9377fb3..5b749c8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,17 +1,4 @@
-FROM sutty/sdk-ruby:latest AS build
-MAINTAINER "f <f@sutty.nl>"
-
-ENV RACK_ENV=production
-
-RUN install -dm 2750 -o app -g www-data /srv/http
-
-USER app
-WORKDIR /srv/http
-COPY --chown=app:www-data ./Gemfile .
-COPY --chown=app:www-data ./config.ru .
-RUN bundle install --path=./vendor
-
-FROM sutty/monit:latest
+FROM sutty/monit:3.11.6
 ENV RACK_ENV=production
 
 RUN addgroup -g 82 -S www-data
@@ -21,14 +8,21 @@ RUN apk add --no-cache ruby ruby-bundler ruby-json
 RUN apk add --no-cache daemonize
 COPY ./monit.conf /etc/monit.d/geminabox.conf
 COPY ./geminabox.sh /usr/local/bin/geminabox
-COPY --from=build /srv/http /srv/http
+
 RUN install -dm 2750 -o app -g www-data /srv/gems
 RUN chmod 755 /usr/local/bin/geminabox
 
 # https://github.com/rubygems/rubygems/issues/2918
 # https://gitlab.alpinelinux.org/alpine/aports/issues/10808
 COPY ./rubygems-platform-musl.patch /tmp/
-RUN apk add --no-cache patch && cd /usr/lib/ruby/2.7.0 && patch -Np 0 -i /tmp/rubygems-platform-musl.patch && apk del patch
+RUN cd /usr/lib/ruby/2.6.0 && patch -Np 0 -i /tmp/rubygems-platform-musl.patch
 
+USER app
+WORKDIR /srv/http
+COPY --chown=app:www-data ./Gemfile .
+COPY --chown=app:www-data ./config.ru .
+RUN bundle install --path=./vendor
+
+USER root
 EXPOSE 9292
 VOLUME /srv/gems
diff --git a/rubygems-platform-musl.patch b/rubygems-platform-musl.patch
index d6db223..4034704 100644
--- a/rubygems-platform-musl.patch
+++ b/rubygems-platform-musl.patch
@@ -1,3 +1,14 @@
+--- rubygems/platform.rb.orig
++++ rubygems/platform.rb
+@@ -89,7 +89,7 @@
+                       when /^dalvik(\d+)?$/ then        [ 'dalvik',    $1  ]
+                       when /^dotnet$/ then              [ 'dotnet',    nil ]
+                       when /^dotnet([\d.]*)/ then       [ 'dotnet',    $1  ]
+-                      when /linux/ then                 [ 'linux',     $1  ]
++                      when /linux-?(\w+)?/ then         [ 'linux',     $1  ]
+                       when /mingw32/ then               [ 'mingw32',   nil ]
+                       when /(mswin\d+)(\_(\d+))?/ then
+                         os, version = $1, $3
 --- rubygems.rb.orig
 +++ rubygems.rb
 @@ -764,10 +764,7 @@