diff --git a/src/context.cr b/src/context.cr
index 935de4d..6a41b6f 100644
--- a/src/context.cr
+++ b/src/context.cr
@@ -6,5 +6,17 @@ class Package::Context
 
 	def initialize
 	end
+
+	def run(chdir, command, args)
+		Process.run command, args, chdir: chdir, output: Process::Redirect::Inherit, error: Process::Redirect::Inherit
+	end
+
+	def run(command, args)
+		run nil, command, args
+	end
+
+	def run(command)
+		run nil, command, nil
+	end
 end
 
diff --git a/src/instructions.cr b/src/instructions.cr
index cf8b509..524701b 100644
--- a/src/instructions.cr
+++ b/src/instructions.cr
@@ -8,8 +8,8 @@ class Package::Instructions
 
 	class BuildDefault
 		getter name : String
-		getter callback : Proc(Recipe, Status)
-		def initialize(@name, &block : Proc(Recipe, Status))
+		getter callback : Proc(Context, Recipe, Status)
+		def initialize(@name, &block : Proc(Context, Recipe, Status))
 			@callback = block
 		end
 	end
@@ -20,10 +20,10 @@ class Package::Instructions
 		end
 		# FIXME: def execute
 
-		def run(recipe : Recipe) : Instructions::Status
+		def run(context : Context, recipe : Recipe) : Instructions::Status
 			if size > 0
 				# FIXME: Maybe do that for [1] and the others, no?
-				child = Process.run "sh", ["-c", self[0]], output: Process::Redirect::Inherit, error: Process::Redirect::Inherit
+				child = context.run recipe.building_directory, "sh", ["-c", self[0]]
 
 				if child.exit_status == 0
 					return Instructions::Status::Success
@@ -33,7 +33,9 @@ class Package::Instructions
 			end
 
 			@defaults_if_empty.each do |default|
-				rvalue = default.callback.call recipe
+				Dir.cd recipe.building_directory
+
+				rvalue = default.callback.call context, recipe
 
 				if rvalue == Status::Pass
 					next
@@ -59,14 +61,14 @@ class Package::Instructions
 	getter install = Set.new
 
 	def initialize
-		@build << BuildDefault.new "autotools" do |recipe|
+		@build << BuildDefault.new "autotools" do |context, recipe|
 			Dir.cd recipe.dirname
 
 			unless File.exists? "configure"
 				next Instructions::Status::Pass
 			end
 
-			child = Process.run("./configure",  ["--prefix=/package"], output: Process::Redirect::Inherit, error: Process::Redirect::Inherit)
+			child = context.run "./configure",  ["--prefix=/package"]
 
 			if child.exit_status == 0
 				Instructions::Status::Success
@@ -75,14 +77,14 @@ class Package::Instructions
 			end
 		end
 
-		@build << BuildDefault.new "make" do |recipe|
+		@build << BuildDefault.new "make" do |context, recipe|
 			Dir.cd recipe.dirname
 
 			unless File.exists? "Makefile"
 				next Instructions::Status::Pass
 			end
 
-			child = Process.run("make", output: Process::Redirect::Inherit, error: Process::Redirect::Inherit)
+			child = context.run "make"
 
 			if child.exit_status == 0
 				Instructions::Status::Success
diff --git a/src/recipe.cr b/src/recipe.cr
index 8ccf71c..1233b0e 100644
--- a/src/recipe.cr
+++ b/src/recipe.cr
@@ -55,7 +55,7 @@ class Package::Recipe
 	def download
 		sources.map do |url|
 			unless File.exists? url.basename
-				Process.run "wget", [ url.to_s, "-O", @context.sources_directory + "/" + url.basename ], output: Process::Redirect::Inherit, error: Process::Redirect::Inherit
+				@context.run @context.sources_directory, "wget", [ url.to_s, "-O", url.basename ]
 			end
 		end
 	end
@@ -66,7 +66,7 @@ class Package::Recipe
 		sources.map do |url|
 			basename = url.basename
 
-			Process.run "tar", [ "xvf", @context.sources_directory + "/" + url.basename ], output: Process::Redirect::Inherit, error: Process::Redirect::Inherit, chdir: building_directory
+			@context.run building_directory, "tar", [ "xvf", @context.sources_directory + "/" + url.basename ]
 		end
 	end
 
@@ -84,11 +84,11 @@ class Package::Recipe
 
 		ENV["PKG"] = fake_root_directory
 
+		# Safety precautions.
 		old_dir = Dir.current
 
 		instructions.to_a.each do |instruction|
-			Dir.cd building_directory
-			if instruction.run(self).failed?
+			if instruction.run(@context, self).failed?
 				break Instructions::Status::Failed
 			end
 		end
@@ -102,7 +102,7 @@ class Package::Recipe
 
 	def package
 		puts "#{fake_root_directory} -> #{@context.packages_directory}/#{name}##{version}.pkg.tar.xz"
-		pp! Process.run "tar", ["cJf", "#{@context.packages_directory}/#{name}##{version}.pkg.tar.xz", "."], output: Process::Redirect::Inherit, error: Process::Redirect::Inherit, chdir: fake_root_directory
+		pp! @context.run fake_root_directory, "tar", ["cJf", "#{@context.packages_directory}/#{name}##{version}.pkg.tar.xz", "."]
 	end
 
 	def clean