diff --git a/src/backends.cr b/src/backends.cr
index 010f439..4944d3d 100644
--- a/src/backends.cr
+++ b/src/backends.cr
@@ -5,7 +5,7 @@ abstract class Package::Backend::Packaging
 	def initialize(@name)
 	end
 
-	abstract def package(context : Context, package : Package) : Bool
+	abstract def package(pkgdir : String, architecture : String, package : Package) : Bool
 	def self.install(packages : Array(String))
 		raise "'install' unimplemented for this backend, yet"
 	end
@@ -14,13 +14,4 @@ abstract class Package::Backend::Packaging
 	end
 end
 
-class Package::Backend::Splitter
-	def initialize(&block : Proc(Recipe, Package))
-		@callback = block
-	end
-
-	def create_split(recipe : Recipe) : Package
-		@callback.call recipe
-	end
-end
-
+require "./backends/*"
\ No newline at end of file
diff --git a/src/backends/apk.cr b/src/backends/apk.cr
index d2472c5..3a45b2f 100644
--- a/src/backends/apk.cr
+++ b/src/backends/apk.cr
@@ -1,23 +1,25 @@
 require "../backends.cr"
 
-class ApkBackend < Package::Backend::Packaging
+class Package::Backend::Packaging::APK < Package::Backend::Packaging
 	def initialize
 		@name = "apk"
 	end
 
-	def package(context : Package::Context, package : Package::Package) : Bool
+	def package(pkgdir : String, architecture : String, package : ::Package::Package) : Bool
 		# FIXME: This needs to have access to architecture (from Context?)
 		#        to work properly.
 		old_cwd = Dir.current
 
-		File.write "#{package.fake_root_directory}/.PKGINFO", ApkBackend.pkginfo package
+		APK.pkginfo package, "#{package.fake_root_directory}/.PKGINFO"
 
 		# Create data.tar.gz here.
-		package_target = "#{context.packages_directory}/#{context.architecture}/#{package.name}-#{package.version}-r#{package.release}.apk"
+		package_target = "#{pkgdir}/"
+		package_target += "#{architecture}/"
+		package_target += "#{package.name}-#{package.version}-r#{package.release}.apk"
 		Dir.mkdir_p File.dirname package_target
 
 		# FIXME: This shouldn’t have to be in users’ PATH. libexec?
-		r = context.run package.fake_root_directory, "#{OWN_LIBEXEC_DIR}/assemble-apk.sh", [
+		r = Do.run package.fake_root_directory, "#{OWN_LIBEXEC_DIR}/assemble-apk.sh", [
 			package_target
 		]
 
@@ -25,34 +27,32 @@ class ApkBackend < Package::Backend::Packaging
 	end
 
 	# This generated file content is specific to the Apk package manager.
-	def self.pkginfo(package)
+	def self.pkginfo(package : ::Package::Package, file_name : String)
 		du = `du -sk #{package.fake_root_directory}`
-		size = du.sub(/[ \t].*/, "").to_i * 1024
+		size = du.sub(/[ \t].*/, "").to_u64 * 1024_u64
 
-		lines = [] of String
+		File.open file_name, "w" do |file|
+			file.puts "# Generated by `packaging`."
+			file.puts "pkgname = #{package.name}"
+			file.puts "pkgver = #{package.version}-r#{package.release}"
+			file.puts "url = #{package.url || ""} "
+			file.puts "size = #{size}"
+			file.puts "origin = #{package.recipe.name}"
+			file.puts "buildtype = host" # This’ll need to be imported from Context.
+			file.puts "builddate = #{Time.utc.to_unix}"
 
-		lines << "# Generated by `packaging`."
-		lines << "pkgname = #{package.name}"
-		lines << "pkgver = #{package.version}-r#{package.release}"
-		lines << "url = #{package.url || ""} "
-		lines << "size = #{size}"
-		lines << "origin = #{package.recipe.name}"
-		lines << "buildtype = host" # This’ll need to be imported from Context.
-		lines << "builddate = #{Time.utc.to_unix}"
+			package.dependencies.each do |atom|
+				file.puts "depend = #{atom.to_s}"
+			end
 
-		package.dependencies.each do |atom|
-			lines << "depend = #{atom.to_s}"
+			package.provides.each do |atom|
+				file.puts "provides = #{atom.to_s}"
+			end
+
+			package.conflicts.each do |atom|
+				file.puts "conflicts = #{atom.to_s}"
+			end
 		end
-
-		package.provides.each do |atom|
-			lines << "provides = #{atom.to_s}"
-		end
-
-		package.conflicts.each do |atom|
-			lines << "conflicts = #{atom.to_s}"
-		end
-
-		lines.join("\n") + "\n"
 	end
 
 	# Install programs.
diff --git a/src/backends/baguette.cr b/src/backends/baguette.cr
index 23d08bb..6bb31bd 100644
--- a/src/backends/baguette.cr
+++ b/src/backends/baguette.cr
@@ -3,38 +3,43 @@ require "openssl"
 require "../backends.cr"
 
 
-class BaguetteBackend < Package::Backend::Packaging
+class Package::Backend::Packaging::Baguette < Package::Backend::Packaging
 	def initialize
 		@name = "package"
 	end
 
 	# TODO: checksums + security
-	def package(context : Package::Context, package : Package::Package) : Bool
+	def package(pkgdir : String, architecture : String, package : ::Package::Package) : Bool
 		# Fake root example: /tmp/packages/<uuid>/root-xz-dev
 		fake_root = package.fake_root_directory
 
-		data_archive_path            = "#{fake_root}/data.tar"
-		compressed_data_archive_path = "#{fake_root}/data.tar.zst"
-		control_spec_file_path       = "#{fake_root}/control.spec"
-		manifest_file_path           = "#{fake_root}/manifest"
+		# Temporary archive, before compression.
+		data_archive_path            = "#{fake_root}/data.tar"     # All archive data.
+		# Content of the final tarball.
+		compressed_data_archive_path = "#{fake_root}/data.tar.zst" # Compressed version (in final tarball).
+		control_spec_file_path       = "#{fake_root}/control.spec" # Spec file, with package informations.
+		manifest_file_path           = "#{fake_root}/manifest"     # List of all the included files.
 
-		package_target = "#{context.packages_directory}/#{package.name}-#{package.version}-#{package.release}.baguette"
+		package_target = "#{pkgdir}/"
+		package_target += "#{architecture}/"
+		package_target += "#{package.name}-#{package.version}-#{package.release}.baguette"
+		Dir.mkdir_p File.dirname package_target
 
-		context.detail "Archiving package content"
-		context.run fake_root, "tar", ["cvf", data_archive_path, "."]
+		::Baguette::Log.detail "Archiving package content"
+		Do.run fake_root, "tar", ["cvf", data_archive_path, "."]
 
-		context.detail "Compressing the archive"
+		::Baguette::Log.detail "Compressing the archive"
 		# produces data.tar.zst
-		context.run fake_root, "zstd", ["--ultra", data_archive_path]
+		Do.run fake_root, "zstd", ["--ultra", data_archive_path]
 
-		context.detail "Generating control.spec"
+		::Baguette::Log.detail "Generating control.spec"
 		generate_spec package, control_spec_file_path
 
-		context.detail "Generating manifest"
-		generate_manifest context, package, manifest_file_path
+		::Baguette::Log.detail "Generating manifest"
+		generate_manifest package, manifest_file_path
 
-		context.detail "Assembling '#{package_target}'"
-		r = context.run fake_root, "tar", [
+		::Baguette::Log.detail "Assembling '#{package_target}'"
+		r = Do.run fake_root, "tar", [
 			"cf", package_target,
 			# WARNING: relative paths are necessary.
 			"control.spec", "manifest", "data.tar.zst"
@@ -43,31 +48,29 @@ class BaguetteBackend < Package::Backend::Packaging
 		r.exit_status == 0
 	end
 
-	def generate_spec(package : Package::Package, file_name : String)
+	def generate_spec(package : ::Package::Package, file_name : String)
 		du = `du -sk #{package.fake_root_directory}`
 		size = du.sub(/[ \t].*/, "").to_u64 * 1024_u64
 
-		file = File.open file_name, "w"
-
-		file.puts "name:    #{package.name}"
-		file.puts "version: #{package.version}"
-		file.puts "release: #{package.release}"
-		file.puts
-		file.puts "size:    #{size}"
-		file.puts "origin:  #{package.recipe.name}"
-		file.puts "slot:    #{package.prefix}"
-		file.puts
-		file.puts "url:         #{package.url}"
-		file.puts "description: #{package.description}"
-		file.puts
-		file.puts "dependencies: #{package.dependencies.join ", "}"
-		file.puts "conflicts:    #{package.conflicts.join ", "}"
-		file.puts "provides:     #{package.provides.join ", "}"
-
-		file.close
+		File.open file_name, "w" do |file|
+			file.puts "name:    #{package.name}"
+			file.puts "version: #{package.version}"
+			file.puts "release: #{package.release}"
+			file.puts
+			file.puts "size:    #{size}"
+			file.puts "origin:  #{package.recipe.name}"
+			file.puts "slot:    #{package.prefix}"
+			file.puts
+			file.puts "url:         #{package.url}"
+			file.puts "description: #{package.description}"
+			file.puts
+			file.puts "dependencies: #{package.dependencies.join ", "}"
+			file.puts "conflicts:    #{package.conflicts.join ", "}"
+			file.puts "provides:     #{package.provides.join ", "}"
+		end
 	end
 
-	def generate_manifest(context : Package::Context, package : Package::Package, file_name : String)
+	def generate_manifest(package : ::Package::Package, file_name : String)
 		old_pwd = Dir.current
 
 		manifest = File.open(file_name, "w").not_nil!
diff --git a/src/backends/build.cr b/src/backends/build.cr
new file mode 100644
index 0000000..3242937
--- /dev/null
+++ b/src/backends/build.cr
@@ -0,0 +1,23 @@
+
+class Package::Backend::Build
+
+	def self.make : Backend::Building
+		Backend::Building.new "build", "make" do |context, recipe|
+			next BuildStatus::Pass unless Dir.exists? recipe.dirname
+			Dir.cd recipe.dirname
+
+			unless File.exists? "Makefile"
+				next BuildStatus::Pass
+			end
+
+			child = Do.sh "make -j#{context.build_cores} #{recipe.options["make"]? || ""}"
+
+			if child.exit_status == 0
+				BuildStatus::Success
+			else
+				BuildStatus::Failed
+			end
+		end
+	end
+
+end
diff --git a/src/backends/configure.cr b/src/backends/configure.cr
new file mode 100644
index 0000000..99ff575
--- /dev/null
+++ b/src/backends/configure.cr
@@ -0,0 +1,47 @@
+
+class Package::Backend::Configure
+
+	def self.autotools : Backend::Building
+		Backend::Building.new "configure", "autotools" do |context, recipe|
+			next BuildStatus::Pass unless Dir.exists? recipe.dirname
+
+			Dir.cd recipe.dirname
+
+			unless File.exists? "configure"
+				next BuildStatus::Pass
+			end
+
+			child = Do.sh "./configure --prefix=#{recipe.prefix} #{recipe.options["configure"]? || ""}"
+
+			if child.exit_status == 0
+				BuildStatus::Success
+			else
+				BuildStatus::Failed
+			end
+		end
+	end
+
+	def self.cmake : Backend::Building
+		Backend::Building.new "configure", "cmake" do |context, recipe|
+			next BuildStatus::Pass unless Dir.exists? recipe.dirname
+
+			Dir.cd recipe.dirname
+
+			next BuildStatus::Pass unless File.exists? "CMakeLists.txt"
+
+			options = [
+				"-DCMAKE_INSTALL_PREFIX='#{recipe.prefix}'",
+				"-DCMAKE_BUILD_TYPE=Release #{recipe.options["cmake"]}",
+				"-- -j#{context.build_cores}"
+			]
+
+			child = Do.sh "cmake . #{options.join " "}"
+			if child.exit_status == 0
+				BuildStatus::Success
+			else
+				BuildStatus::Failed
+			end
+		end
+	end
+
+end
diff --git a/src/backends/install.cr b/src/backends/install.cr
new file mode 100644
index 0000000..4b812e5
--- /dev/null
+++ b/src/backends/install.cr
@@ -0,0 +1,23 @@
+
+class Package::Backend::Install
+	def self.make : Backend::Building
+		Backend::Building.new "install", "make" do |context, recipe|
+			next BuildStatus::Pass unless Dir.exists? recipe.dirname
+			Dir.cd recipe.dirname
+
+			unless File.exists? "Makefile"
+				next BuildStatus::Pass
+			end
+
+			child = Do.sh "make install 'DESTDIR=#{recipe.fake_root_directory}' #{recipe.options["make install"]? || ""}"
+
+			if child.exit_status == 0
+				BuildStatus::Success
+			else
+				BuildStatus::Failed
+			end
+		end
+	end
+
+end
+
diff --git a/src/backends/pkgutils.cr b/src/backends/pkgutils.cr
index 65895db..8f3e35d 100644
--- a/src/backends/pkgutils.cr
+++ b/src/backends/pkgutils.cr
@@ -1,13 +1,21 @@
 require "../backends.cr"
+require "baguette-crystal-base"
 
-class PkgutilsBackend < Package::Backend::Packaging
+# This packaging backend only helps to create a package containing the data.
+# This serves as the simplest example of packaging system:
+# no extra data nor structure in the final archive.
+
+class Package::Backend::Packaging::Pkgutils < Package::Backend::Packaging
 	def initialize
 		@name = "pkgutils"
 	end
 
-	def package(context : Package::Context, package : Package::Package) : Bool
-		puts "#{package.fake_root_directory} -> #{context.packages_directory}/#{package.name}##{package.version}-#{package.release}.pkg.tar.xz"
-		pp! r = context.run package.fake_root_directory, "tar", ["cJf", "#{context.packages_directory}/#{package.name}##{package.version}.pkg.tar.xz", "."]
+	def package(pkgdir : String, architecture : String, package : ::Package::Package) : Bool
+		package_file = pkgdir + "/" + architecture + "/"
+		package_file += "#{package.name}-#{package.version}-#{package.release}.pkg.tar.xz"
+
+		::Baguette::Log.info "#{package.fake_root_directory} -> #{package_file}"
+		pp! r = Do.run package.fake_root_directory, "tar", ["cJf", package_file, "."]
 
 		r.exit_status == 0
 	end
diff --git a/src/backends/splitter.cr b/src/backends/splitter.cr
new file mode 100644
index 0000000..dfb32c0
--- /dev/null
+++ b/src/backends/splitter.cr
@@ -0,0 +1,75 @@
+
+class Package::Backend::Splitter
+	def initialize(&block : Proc(Recipe, Package))
+		@callback = block
+	end
+
+	def create_split(recipe : Recipe) : Package
+		@callback.call recipe
+	end
+
+	# Package::Backend::Splitter = create new package
+	#    takes (then stores) the given block
+	#    this block takes a recipe as a parameter and create a new package
+	# the new package:
+	#    keep prefixes
+	#    new name = split name (-man, -src, ...)
+	#    split files
+
+	# Man-pages and documentation
+	def self.man(prefixes : Array(String)) : Splitter
+		Backend::Splitter.new do |recipe|
+			Package.new(recipe, true).tap do |split|
+				prefixes = (prefixes + [recipe.prefix]).uniq
+
+				split.name = "#{recipe.name}-man"
+				split.files = prefixes.map do |prefix|
+					"#{prefix}/share/man"
+				end
+				split.recipe.require_stripping = false
+			end
+		end
+	end
+
+	# Developer's files: headers, pkgconfig files, *.a.
+	def self.dev(prefixes : Array(String)) : Splitter
+		Backend::Splitter.new do |recipe|
+			Package.new(recipe, true).tap do |split|
+				prefixes = (prefixes + [recipe.prefix]).uniq
+
+				split.name = "#{recipe.name}-dev"
+				split.files = prefixes.map do |prefix|
+					[
+						"#{prefix}/include",
+						"#{prefix}/lib/pkgconfig"
+					]
+				end.flatten
+				split.file_patterns = prefixes.map do |prefix|
+					Regex.new("^" + prefix + ".*\\.a$")
+				end
+				# Any prefix containing "/include/"
+				split.file_patterns.not_nil! << Regex.new(".*/include/.*.h(pp)?")
+			end
+		end
+	end
+
+	# Source files: prefix containing "src".
+	def self.src(prefixes : Array(String)) : Splitter
+		Backend::Splitter.new do |recipe|
+			Package.new(recipe, true).tap do |split|
+				prefixes = (prefixes + [recipe.prefix]).uniq
+
+				split.name = "#{recipe.name}-src"
+				split.files = prefixes.map do |prefix|
+					[
+						"#{prefix}/lib/share/src",
+						"#{prefix}/src",
+						"#{prefix}/usr/src",
+						"#{prefix}/usr/local/src"
+					]
+				end.flatten
+				split.recipe.require_stripping = false
+			end
+		end
+	end
+end
diff --git a/src/context.cr b/src/context.cr
index f14fe3a..b5e3dd3 100644
--- a/src/context.cr
+++ b/src/context.cr
@@ -1,14 +1,8 @@
 require "colorize"
-
 require "specparser"
 
 require "./exception.cr"
-
 require "./config.cr"
-
-require "./backends/baguette.cr"
-require "./backends/apk.cr"
-require "./backends/pkgutils.cr"
 require "./backends.cr"
 
 class Package::Context
@@ -29,157 +23,37 @@ class Package::Context
 
 	# prefixes for `packaging` running environment and child processes
 	# = where to search for binaries and libraries for the build
-	property prefixes = ["/usr", "/", "/usr/baguette"]
+	property prefixes = ["/usr/baguette", "/usr", "/"]
 
 	# By default, building a package only uses one core
 	property build_cores = 1
 
 	# list of environment variables we want to have when building
-	property environment = {} of String => String
-
-	property verbosity = 0
+	#property environment = {} of String => String
 
 	property recipe : Recipe? = nil
 
 
 	def initialize
-		@packaging_backends << ApkBackend.new
-		@packaging_backends << BaguetteBackend.new
-		@packaging_backends << PkgutilsBackend.new
+		# Add package backends: baguette (package-tools) and apk.
+		# They implement the Backend::Packaging abstract class:
+		#   init (@name) + package (context, package) method
+		@packaging_backends << Backend::Packaging::Baguette.new
+		@packaging_backends << Backend::Packaging::APK.new
+		@packaging_backends << Backend::Packaging::Pkgutils.new
 
 		@selected_packaging_backend = @packaging_backends[0]
 
-		@building_backends << Backend::Building.new "configure", "autotools" do |context, recipe|
-			next BuildStatus::Pass unless Dir.exists? recipe.dirname
+		# Add building backends: configuration, build and install.
+		@building_backends << Backend::Configure.autotools
+		@building_backends << Backend::Configure.cmake
+		@building_backends << Backend::Build.make
+		@building_backends << Backend::Install.make
 
-			Dir.cd recipe.dirname
-
-			unless File.exists? "configure"
-				next BuildStatus::Pass
-			end
-
-			child = context.sh "./configure --prefix=#{recipe.prefix} #{recipe.options["configure"]? || ""}"
-
-			if child.exit_status == 0
-				BuildStatus::Success
-			else
-				BuildStatus::Failed
-			end
-		end
-
-		@building_backends << Backend::Building.new "configure", "cmake" do |context, recipe|
-			next BuildStatus::Pass unless Dir.exists? recipe.dirname
-
-			Dir.cd recipe.dirname
-
-			next BuildStatus::Pass unless File.exists? "CMakeLists.txt"
-
-			options = [
-				"-DCMAKE_INSTALL_PREFIX='#{recipe.prefix}'",
-				"-DCMAKE_BUILD_TYPE=Release #{recipe.options["cmake"]}",
-				"-- -j#{context.build_cores}"
-			]
-
-			child = context.sh "cmake . #{options.join " "}"
-			if child.exit_status == 0
-				BuildStatus::Success
-			else
-				BuildStatus::Failed
-			end
-		end
-
-		@building_backends << Backend::Building.new "build", "make" do |context, recipe|
-			next BuildStatus::Pass unless Dir.exists? recipe.dirname
-			Dir.cd recipe.dirname
-
-			unless File.exists? "Makefile"
-				next BuildStatus::Pass
-			end
-
-			child = context.sh "make -j#{context.build_cores} #{recipe.options["make"]? || ""}"
-
-			if child.exit_status == 0
-				BuildStatus::Success
-			else
-				BuildStatus::Failed
-			end
-		end
-
-		@building_backends << Backend::Building.new "install", "make" do |context, recipe|
-			next BuildStatus::Pass unless Dir.exists? recipe.dirname
-			Dir.cd recipe.dirname
-
-			unless File.exists? "Makefile"
-				next BuildStatus::Pass
-			end
-
-			child = context.sh "make install 'DESTDIR=#{recipe.fake_root_directory}' #{recipe.options["make install"]? || ""}"
-
-			if child.exit_status == 0
-				BuildStatus::Success
-			else
-				BuildStatus::Failed
-			end
-		end
-
-		# Package::Backend::Splitter = create new package
-		#    takes (then stores) the given block
-		#    this block takes a recipe as a parameter and create a new package
-		# the new package:
-		#    keep prefixes
-		#    new name = split name (-man, -src, ...)
-		#    split files
-
-		# Man-pages and documentation
-		@splitter_backends << Backend::Splitter.new do |recipe|
-			Package.new(recipe, true).tap do |split|
-				prefixes = (@prefixes + [recipe.prefix]).uniq
-
-				split.name = "#{recipe.name}-man"
-				split.files = prefixes.map do |prefix|
-					"#{prefix}/share/man"
-				end
-				split.recipe.require_stripping = false
-			end
-		end
-
-		# Developer's files: headers, pkgconfig files, *.a.
-		@splitter_backends << Backend::Splitter.new do |recipe|
-			Package.new(recipe, true).tap do |split|
-				prefixes = (@prefixes + [recipe.prefix]).uniq
-
-				split.name = "#{recipe.name}-dev"
-				split.files = prefixes.map do |prefix|
-					[
-						"#{prefix}/include",
-						"#{prefix}/lib/pkgconfig"
-					]
-				end.flatten
-				split.file_patterns = prefixes.map do |prefix|
-					Regex.new("^" + prefix + ".*\\.a$")
-				end
-				# Any prefix containing "/include/"
-				split.file_patterns.not_nil! << Regex.new(".*/include/.*/")
-			end
-		end
-
-		# Source files: prefix containing "src".
-		@splitter_backends << Backend::Splitter.new do |recipe|
-			Package.new(recipe, true).tap do |split|
-				prefixes = (@prefixes + [recipe.prefix]).uniq
-
-				split.name = "#{recipe.name}-src"
-				split.files = prefixes.map do |prefix|
-					[
-						"#{prefix}/lib/share/src",
-						"#{prefix}/src",
-						"#{prefix}/usr/src",
-						"#{prefix}/usr/local/src"
-					]
-				end.flatten
-				split.recipe.require_stripping = false
-			end
-		end
+		# Split = new package from a recipe, each one with different files being included.
+		@splitter_backends << Backend::Splitter.man @prefixes
+		@splitter_backends << Backend::Splitter.dev @prefixes
+		@splitter_backends << Backend::Splitter.src @prefixes
 	end
 
 	def packaging_backend=(name : String)
@@ -190,84 +64,8 @@ class Package::Context
 		@selected_packaging_backend = backend
 	end
 
-	def run(chdir, command, args)
-		output = Process::Redirect::Inherit
-
-		if @verbosity < -1
-			output = Process::Redirect::Close
-		else
-			# log sub-commands outputs
-			logfile_path = "#{@working_directory}/#{@recipe.not_nil!.working_uuid}.log"
-			output = File.open logfile_path, "a"
-			STDOUT.puts "logging command " +
-				"#{command} #{args}".colorize(:light_magenta).to_s
-			STDOUT.puts "in " + logfile_path.colorize(:blue).mode(:bright).to_s
-
-			output.puts ""
-			output.puts ""
-			output.puts "logging command $ #{command}"
-			output.puts "     parameters $ #{args}"
-		end
-
-		c = Process.run command, args, chdir: chdir, output: output, error: output, env: @environment
-
-		case output
-		when File
-			output.close
-		end
-
-		c
-	end
-
-	def run(command, args)
-		run nil, command, args
-	end
-
-	def run(command)
-		run nil, command, nil
-	end
-
-	def sh(command)
-		run nil, "sh", ["-x", "-e", "-c", command]
-	end
-
-	def captured_sh(command)
-		output = IO::Memory.new
-		child = Process.run "sh", ["-x", "-e", "-c", command], output: output
-
-		{child, output}
-	end
-
-	# Log file moves during splits.
-	def mv(f1 : String, f2 : String)
-		run "mv", [ f1, f2 ]
-	end
-
-	# Log directory creations during splits.
-	def mkdir_p(dir : String)
-		run "mkdir", [ "-p", dir ]
-	end
-
-	# Output functions.
-	def title(s)
-		return if @verbosity < -3
-		puts ">> ".colorize(:green).mode(:bright).to_s +
-			s.colorize(:white).mode(:bright).to_s
-		STDOUT.flush
-	end
-	def info(s)
-		return if @verbosity < -2
-		puts ":: ".colorize(:green).to_s + s.colorize(:white).to_s
-		STDOUT.flush
-	end
-	def detail(s)
-		return if @verbosity < -1
-		puts ("+  " + s).colorize(:cyan)
-		STDOUT.flush
-	end
-
 	def package(package : Package) : Bool
-		@selected_packaging_backend.package self, package
+		@selected_packaging_backend.package @packages_directory, @architecture, package
 	end
 
 	def read_recipe(filename : String)
@@ -320,8 +118,8 @@ class Package::Context
 					end
 
 					key, value = match
-					@environment[key] = value
-					if @verbosity > 0
+					Do.environment[key] = value
+					if Baguette::Context.verbosity > 2
 						STDOUT.puts "environment: #{key} => #{value}"
 					end
 				end
diff --git a/src/do.cr b/src/do.cr
index fddfbb8..7e320e8 100644
--- a/src/do.cr
+++ b/src/do.cr
@@ -1,9 +1,75 @@
 
+class Baguette::Context
+	#class_property logfile_path = "#{@working_directory}/#{@recipe.not_nil!.working_uuid}.log"
+	class_property logfile_path = "/tmp/package-create.log"
+	class_property no_logfile = false
+end
+
 class Do < Process
+	class_property environment = {} of String => String
+
 	def self.require_cmd(cmd : String)
 		unless Process.run("which", [ cmd ]).success?
 			STDERR.puts "#{cmd} isn't installed"
 			exit 1
 		end
 	end
+
+	def self.run(chdir, command, args)
+		output = Process::Redirect::Inherit
+
+		if Baguette::Context.no_logfile
+			output = Process::Redirect::Close
+		else
+			# log sub-commands outputs
+			STDOUT.puts "logging command " +
+				"#{command} #{args}".colorize(:light_magenta).to_s
+			STDOUT.puts "in " + Baguette::Context.logfile_path.colorize(:blue).mode(:bright).to_s
+
+			File.open Baguette::Context.logfile_path, "a" do |file|
+				file.puts ""
+				file.puts ""
+				file.puts "logging command $ #{command}"
+				file.puts "     parameters $ #{args}"
+			end
+		end
+
+		c = Process.run command, args, chdir: chdir, output: output, error: output, env: @@environment
+
+		case output
+		when File
+			output.close
+		end
+
+		c
+	end
+
+	def self.run(command, args)
+		self.run nil, command, args
+	end
+
+	def self.run(command)
+		self.run nil, command, nil
+	end
+
+	def self.sh(command)
+		self.run nil, "sh", ["-x", "-e", "-c", command]
+	end
+
+	def self.captured_sh(command)
+		output = IO::Memory.new
+		child = Process.run "sh", ["-x", "-e", "-c", command], output: output
+
+		{child, output}
+	end
+
+	# Log file moves during splits.
+	def self.mv(f1 : String, f2 : String)
+		self.run "mv", [ f1, f2 ]
+	end
+
+	# Log directory creations during splits.
+	def self.mkdir_p(dir : String)
+		self.run "mkdir", [ "-p", dir ]
+	end
 end
diff --git a/src/instructions.cr b/src/instructions.cr
index 08c6e10..4de3ace 100644
--- a/src/instructions.cr
+++ b/src/instructions.cr
@@ -28,7 +28,7 @@ class Package::Instructions
 		def run(context : Context, recipe : Recipe) : BuildStatus
 			if size > 0
 				each do |command|
-					child = context.run recipe.building_directory, "sh", ["-x", "-c", command]
+					child = Do.run recipe.building_directory, "sh", ["-x", "-c", command]
 
 					if child.exit_status != 0
 						return BuildStatus::Failed
diff --git a/src/main.cr b/src/main.cr
index 8829342..3d84f4e 100644
--- a/src/main.cr
+++ b/src/main.cr
@@ -1,6 +1,7 @@
 require "option_parser"
 require "file_utils"
 require "colorize"
+require "baguette-crystal-base"
 
 require "./context.cr"
 require "./recipe.cr"
@@ -70,11 +71,11 @@ OptionParser.parse do |parser|
 	}
 
 	parser.on("-v", "--verbose", "Runs more verbosely.") {
-		context.verbosity += 1
+		Baguette::Context.verbosity += 1
 	}
 
 	parser.on("-q", "--quiet", "Runs more quietely.") {
-		context.verbosity -= 1
+		Baguette::Context.verbosity -= 1
 	}
 
 	parser.on("-n", "--ignore-dependencies", "Do not try to install build-dependencies.") {
@@ -172,7 +173,7 @@ begin
 	recipes.each do |recipe|
 		latest_build_dir = recipe.building_directory
 
-		context.title recipe.name
+		Baguette::Log.title recipe.name
 
 		recipe.download
 
diff --git a/src/recipe.cr b/src/recipe.cr
index a465a3f..0bb4f8c 100644
--- a/src/recipe.cr
+++ b/src/recipe.cr
@@ -216,13 +216,13 @@ class Package::Recipe
 
 			unless File.exists? filename
 				if url.scheme == "file"
-					@context.info "Copying '#{url.filename}'"
+					Baguette::Log.info "Copying '#{url.filename}'"
 
 					FileUtils.cp "#{recipe_directory}/#{url.filename}", filename
 				else
-					@context.info "Downloading '#{url.filename}'"
+					Baguette::Log.info "Downloading '#{url.filename}'"
 
-					status = @context.run @context.sources_directory, "wget", [ url.to_s, "-O", filename ]
+					status = Do.run @context.sources_directory, "wget", [ url.to_s, "-O", filename ]
 
 					raise DownloadError.new self, url unless status.success?
 				end
@@ -231,15 +231,15 @@ class Package::Recipe
 	end
 
 	def extract
-		@context.mkdir_p building_directory
+		Do.mkdir_p building_directory
 
 		sources.each do |url|
 			basename = url.filename
 
 			if basename.match /\.(tar\.(gz|xz|bz2|lzma)|tgz)$/
-				@context.info "Extracting '#{url.filename}'"
+				Baguette::Log.info "Extracting '#{url.filename}'"
 
-				status = @context.run(
+				status = Do.run(
 					building_directory,
 					"bsdtar", [
 						"xf",
@@ -249,9 +249,9 @@ class Package::Recipe
 
 				raise ExtractionError.new self, url unless status.success?
 			elsif basename.match /\.patch$/
-				@context.info "Applying '#{url.filename}'"
+				Baguette::Log.info "Applying '#{url.filename}'"
 
-				status = @context.run(
+				status = Do.run(
 					"#{building_directory}/#{dirname}",
 					"patch", [
 						"-i", "#{@context.sources_directory}/#{url.filename}"
@@ -260,7 +260,7 @@ class Package::Recipe
 
 				raise ExtractionError.new self, url unless status.success?
 			else
-				@context.info "Copying '#{url.filename}'"
+				Baguette::Log.info "Copying '#{url.filename}'"
 
 				directory = if url.scheme == "file"
 					@recipe_directory
@@ -282,7 +282,7 @@ class Package::Recipe
 	#     goes somehow wrong.
 	#   - Make things thread-safe. (those ENV[]= calls are definitely not)
 	def build
-		@context.mkdir_p fake_root_directory
+		Do.mkdir_p fake_root_directory
 
 		ENV["PKG"] = fake_root_directory
 
@@ -290,7 +290,7 @@ class Package::Recipe
 		old_dir = Dir.current
 
 		instructions.to_a.each do |instruction|
-			@context.info "Building ('#{instruction.phase}' phase)"
+			Baguette::Log.info "Building ('#{instruction.phase}' phase)"
 
 			if instruction.run(@context, self).failed?
 				raise BuildError.new self, "Building (#{instruction.phase} phase) failed."
@@ -312,7 +312,7 @@ class Package::Recipe
 	end
 
 	private def do_strip
-		@context.info "Stripping binaries"
+		Baguette::Log.info "Stripping binaries"
 
 		FileUtils.find_files(fake_root_directory) do |path|
 			file_output = `file #{path}`
@@ -327,7 +327,7 @@ class Package::Recipe
 			end
 
 			if strip_opt
-				@context.detail "stripping #{path}"
+				Baguette::Log.detail "stripping #{path}"
 
 				Process.run "strip", [strip_opt, path]
 			end
@@ -357,7 +357,7 @@ class Package::Recipe
 			end
 
 			if files_to_split.size > 0
-				@context.info "Splitting " + "'#{package.name}'".colorize(:light_red).underline.to_s
+				Baguette::Log.info "Splitting " + "'#{package.name}'".colorize(:light_red).underline.to_s
 			end
 
 			# FIXME: What do we do if those are not on the filesystem?
@@ -365,11 +365,11 @@ class Package::Recipe
 				origin = "#{fake_root_directory}#{file}"
 				destination = "#{package.fake_root_directory}#{file}"
 
-				@context.detail "Moving '#{file}' to split"
+				Baguette::Log.detail "Moving '#{file}' to split"
 
-				@context.mkdir_p File.dirname destination
+				Do.mkdir_p File.dirname destination
 
-				@context.mv(
+				Do.mv(
 					"#{fake_root_directory}#{file}",
 					"#{package.fake_root_directory}#{file}"
 				)
@@ -394,7 +394,7 @@ class Package::Recipe
 				next
 			end
 
-			@context.info "Assembling " + "'#{package.name}'".colorize(:light_red).underline.to_s
+			Baguette::Log.info "Assembling " + "'#{package.name}'".colorize(:light_red).underline.to_s
 
 			unless @context.package package
 				raise PackagingError.new self, package
@@ -408,7 +408,7 @@ class Package::Recipe
 
 	def watch
 		if script = @watch_script
-			status, output = @context.captured_sh script
+			status, output = Do.captured_sh script
 
 			output = output.to_s
 				.gsub(/^[ \t\n]*/, "").gsub(/[ \t\n]*$/, "")
diff --git a/src/tools/baguette.cr b/src/tools/baguette.cr
index 2cff477..f4c0912 100644
--- a/src/tools/baguette.cr
+++ b/src/tools/baguette.cr
@@ -44,7 +44,7 @@ class Action
 
 			latest_build_dir = recipe.building_directory
 
-			context.title recipe.name
+			Do.title recipe.name
 
 			# recipe.download
 			# recipe.extract