diff --git a/lib/compass.rb b/lib/compass.rb
index 665e5a86..d82db208 100644
--- a/lib/compass.rb
+++ b/lib/compass.rb
@@ -29,9 +29,6 @@ module Compass
     File.expand_path(File.join(File.dirname(__FILE__)))
   end
   module_function :base_directory, :lib_directory
-
-  class Error < StandardError
-  end
 end
 
 require File.join(File.dirname(__FILE__), 'compass', 'frameworks')
diff --git a/lib/compass/actions.rb b/lib/compass/actions.rb
index 511fe34b..a853ee40 100644
--- a/lib/compass/actions.rb
+++ b/lib/compass/actions.rb
@@ -13,7 +13,7 @@ module Compass
       if File.exists?(to) && !options[:force]
         #TODO: Detect differences & provide an overwrite prompt
         msg = "#{basename(to)} already exists."
-        raise InstallationError.new(msg)
+        raise Compass::FilesystemConflict.new(msg)
       elsif File.exists?(to)
         logger.record :overwrite, basename(to)
         FileUtils.rm to unless options[:dry_run]
@@ -31,7 +31,7 @@ module Compass
           logger.record :exists, basename(dir)
       elsif File.exists?(dir)
         msg = "#{basename(dir)} already exists and is not a directory."
-        raise InstallationError.new(msg)
+        raise Compass::FilesystemConflict.new(msg)
       else
         logger.record :directory, basename(dir)
         FileUtils.mkdir_p(dir) unless options[:dry_run]
@@ -43,7 +43,7 @@ module Compass
       options ||= self.options if self.respond_to?(:options)
       if File.exists?(file_name) && !options[:force]
         msg = "File #{basename(file_name)} already exists. Run with --force to force creation."
-        raise InstallationError.new(msg)
+        raise Compass::FilesystemConflict.new(msg)
       end
       if File.exists?(file_name)
         logger.record :overwrite, basename(file_name)
diff --git a/lib/compass/commands/update_project.rb b/lib/compass/commands/update_project.rb
index ef227d6c..7e7972b2 100644
--- a/lib/compass/commands/update_project.rb
+++ b/lib/compass/commands/update_project.rb
@@ -52,9 +52,9 @@ module Compass
 
       def assert_project_directory_exists!
         if File.exists?(project_directory) && !File.directory?(project_directory)
-          raise Compass::Exec::ExecError.new("#{project_directory} is not a directory.")
+          raise Compass::FilesystemConflict.new("#{project_directory} is not a directory.")
         elsif !File.directory?(project_directory)
-          raise ::Compass::Exec::ExecError.new("#{project_directory} does not exist.")
+          raise Compass::Error.new("#{project_directory} does not exist.")
         end
       end
 
diff --git a/lib/compass/errors.rb b/lib/compass/errors.rb
new file mode 100644
index 00000000..d0dccfcd
--- /dev/null
+++ b/lib/compass/errors.rb
@@ -0,0 +1,7 @@
+module Compass
+  class Error < StandardError
+  end
+
+  class FilesystemConflict < Error
+  end
+end
\ No newline at end of file
diff --git a/lib/compass/exec.rb b/lib/compass/exec.rb
index 12c20e00..baa287b1 100644
--- a/lib/compass/exec.rb
+++ b/lib/compass/exec.rb
@@ -3,16 +3,11 @@ require 'rubygems'
 require 'haml'
 require File.join(Compass.lib_directory, 'compass', 'logger')
 require File.join(Compass.lib_directory, 'compass', 'configuration')
+require File.join(Compass.lib_directory, 'compass', 'errors')
 require File.join(Compass.lib_directory, 'compass', 'actions')
 
 module Compass
   module Exec
-    class ExecError < StandardError
-    end
-
-    class DirectoryExistsError < ExecError
-    end
-
 
     def report_error(e, options)
       $stderr.puts "#{e.class} on line #{get_line e} of #{get_file e}: #{e.message}"
@@ -51,7 +46,7 @@ module Compass
           perform!
         rescue Exception => e
           raise e if e.is_a? SystemExit
-          if e.is_a?(ExecError) || e.is_a?(OptionParser::ParseError)
+          if e.is_a?(::Compass::Error) || e.is_a?(OptionParser::ParseError)
             $stderr.puts e.message
           else
             ::Compass::Exec.report_error(e, @options)
diff --git a/lib/compass/installers.rb b/lib/compass/installers.rb
index 3a86dff8..a92f1a3f 100644
--- a/lib/compass/installers.rb
+++ b/lib/compass/installers.rb
@@ -1,15 +1,3 @@
-module Compass
-  module Installers
-
-    class InstallationError < Compass::Error
-    end
-
-    class DirectoryExistsError < InstallationError
-    end
-
-  end
-end
-
 require File.join(File.dirname(__FILE__), 'installers', 'manifest')
 require File.join(File.dirname(__FILE__), 'installers', 'base')
 require File.join(File.dirname(__FILE__), 'installers', 'stand_alone')