diff --git a/.ruby-version b/.ruby-version
index 0cadbc1e..35d16fb1 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.5.5
+2.5.7
diff --git a/Gemfile b/Gemfile
index 2d169738..ce16e8a9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -14,6 +14,8 @@ git_source(:github) do |repo_name|
   "https://github.com/#{repo_name}.git"
 end
 
+ruby '2.5.7'
+
 gem 'dotenv-rails', require: 'dotenv/rails-now'
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
diff --git a/Gemfile.lock b/Gemfile.lock
index 978e8924..871b07bc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -487,5 +487,8 @@ DEPENDENCIES
   webpacker
   yaml_db!
 
+RUBY VERSION
+   ruby 2.5.7p206
+
 BUNDLED WITH
    2.0.2
diff --git a/Makefile b/Makefile
index c1d5d4f1..226328d2 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,7 @@
 # Incluir las variables de entorno
-include .env
+mkfile_path := $(abspath $(lastword $(MAKEFILE_LIST)))
+root_dir := $(patsubst %/,%,$(dir $(mkfile_path)))
+include $(root_dir)/.env
 
 # Limpiar los archivos de testeo
 clean:
@@ -13,19 +15,38 @@ build:
 ../gems/:
 	mkdir -p $@
 
+gem_dir := $(shell readlink -f ../gems)
+gems := $(shell bundle show --paths | xargs -I {} sh -c 'test -d {}/ext && basename {}')
+gems_musl := $(patsubst %,$(gem_dir)/%-x86_64-linux-musl.gem,$(gems))
+
+$(gem_dir)/%-x86_64-linux-musl.gem:
+	docker run \
+		-v $(gem_dir):/srv/gems \
+		-v `readlink -f ~/.ccache`:/home/builder/.ccache \
+		-e HTTP_BASIC_USER=$(HTTP_BASIC_USER) \
+		-e HTTP_BASIC_PASSWORD=$(HTTP_BASIC_PASSWORD) \
+		-e GEM=`echo $* | sed -re "s/-[^-]+$$//"` \
+		-e VERSION=`echo $* | sed -re "s/.*-([^-]+)$$/\1/"` \
+		sutty/gem-compiler:latest
+
 # Compilar todas las gemas binarias y subirlas a gems.sutty.nl para que
 # al crear el contenedor no tengamos que compilarlas cada vez
-convert-gems: ../gems/
-	bundle show --paths \
-		| xargs -I {} sh -c 'test -d {}/ext && basename {}' \
-		| sed -re "s/-([^-]+)$$/\t\1/" \
-		| while read gem version; do \
-				docker run \
-					-v `readlink -f $<`:/srv/gems \
-					-v `readlink -f ~/.ccache`:/home/builder/.ccache \
-					-e HTTP_BASIC_USER=$(HTTP_BASIC_USER) \
-					-e HTTP_BASIC_PASSWORD=$(HTTP_BASIC_PASSWORD) \
-					-e GEM=$$gem \
-					-e VERSION=$$version \
-					sutty/gem-compiler:latest ; \
-			done
+convert-gems: $(gems_musl)
+
+dirs := $(patsubst %,root/%,data sites deploy public)
+
+$(dirs):
+	mkdir -p $@
+
+test-container: $(dirs)
+	docker run -v $(PWD)/root/data:/srv/http/data \
+	           -v $(PWD)/root/sites:/srv/http/_sites \
+	           -v $(PWD)/root/deploy:/srv/http/_deploy \
+	           -v $(PWD)/root/public:/srv/http/_public \
+	           -v $(PWD)/config/credentials.yml.enc:/srv/http/config/credentials.yml.enc \
+	           -e RAILS_MASTER_KEY=`cat config/master.key` \
+						 -it \
+	           --rm \
+	           --name=sutty \
+	           sutty/sutty \
+						 /bin/sh