diff --git a/lib/ceedling/configurator_builder.rb b/lib/ceedling/configurator_builder.rb
index 6d3a5758..d23d698d 100644
--- a/lib/ceedling/configurator_builder.rb
+++ b/lib/ceedling/configurator_builder.rb
@@ -311,9 +311,10 @@ def collect_tests(in_hash)
       all_tests.include( File.join(path, "#{in_hash[:project_test_file_prefix]}*#{in_hash[:extension_source]}") )
     end
 
-    @file_path_collection_utils.revise_filelist( all_tests, in_hash[:files_test] )
-
-    return {:collection_all_tests => all_tests}
+    return {
+      # Add / subtract files via :files ↳ :test
+      :collection_all_tests => @file_path_collection_utils.revise_filelist( all_tests, in_hash[:files_test] )
+    }
   end
 
 
@@ -332,10 +333,11 @@ def collect_assembly(in_hash)
       all_assembly.include( File.join(path, "*#{in_hash[:extension_assembly]}") )
     end
 
-    # Also add files that we are explicitly adding via :files:assembly: section
-    @file_path_collection_utils.revise_filelist( all_assembly, in_hash[:files_assembly] )
+    return {
+      # Add / subtract files via :files ↳ :assembly
+      :collection_all_assembly => @file_path_collection_utils.revise_filelist( all_assembly, in_hash[:files_assembly] )
+    }
 
-    return {:collection_all_assembly => all_assembly}
   end
 
 
@@ -346,9 +348,10 @@ def collect_source(in_hash)
       all_source.include( File.join(path, "*#{in_hash[:extension_source]}") )
     end
 
-    @file_path_collection_utils.revise_filelist( all_source, in_hash[:files_source] )
-
-    return {:collection_all_source => all_source}
+    return {
+      # Add / subtract files via :files ↳ :source
+      :collection_all_source => @file_path_collection_utils.revise_filelist( all_source, in_hash[:files_source] )
+    }
   end
 
 
@@ -364,9 +367,10 @@ def collect_headers(in_hash)
       all_headers.include( File.join(path, "*#{in_hash[:extension_header]}") )
     end
 
-    @file_path_collection_utils.revise_filelist( all_headers, in_hash[:files_include] )
-
-    return {:collection_all_headers => all_headers}
+    return {
+      # Add / subtract files via :files ↳ :include
+      :collection_all_headers => @file_path_collection_utils.revise_filelist( all_headers, in_hash[:files_include] )
+    }
   end
 
 
@@ -387,10 +391,13 @@ def collect_release_build_input(in_hash)
       release_input.include( File.join(path, "*#{in_hash[:extension_assembly]}") ) if in_hash[:release_build_use_assembly]
     end
 
-    @file_path_collection_utils.revise_filelist( release_input, in_hash[:files_source] )
-    @file_path_collection_utils.revise_filelist( release_input, in_hash[:files_assembly] ) if in_hash[:release_build_use_assembly]
+    # Add / subtract files via :files ↳ :source & :files ↳ :assembly
+    revisions =  in_hash[:files_source]
+    revisions += in_hash[:files_assembly] if in_hash[:release_build_use_assembly]
 
-    return {:collection_release_build_input => release_input}
+    return {
+      :collection_release_build_input => @file_path_collection_utils.revise_filelist( release_input, revisions )
+    }
   end
 
 
@@ -420,12 +427,15 @@ def collect_existing_test_build_input(in_hash)
       all_input.include( File.join(path, "*#{in_hash[:extension_assembly]}") ) if in_hash[:test_build_use_assembly]
     end
 
-    @file_path_collection_utils.revise_filelist( all_input, in_hash[:files_test] )
-    @file_path_collection_utils.revise_filelist( all_input, in_hash[:files_support] )
-    @file_path_collection_utils.revise_filelist( all_input, in_hash[:files_source] )
-    @file_path_collection_utils.revise_filelist( all_input, in_hash[:files_assembly] ) if in_hash[:test_build_use_assembly]
+    # Add / subtract files via :files entries
+    revisions =  in_hash[:files_test]
+    revisions += in_hash[:files_support]
+    revisions += in_hash[:files_source]
+    revisions += in_hash[:files_assembly] if in_hash[:test_build_use_assembly]
 
-    return {:collection_existing_test_build_input => all_input}
+    return {
+      :collection_existing_test_build_input => @file_path_collection_utils.revise_filelist( all_input, revisions )
+    }
   end
 
 
@@ -451,10 +461,7 @@ def collect_test_fixture_extra_link_objects(in_hash)
       support.include( File.join(path, "*#{in_hash[:extension_assembly]}") ) if in_hash[:test_build_use_assembly]
     end
 
-    @file_path_collection_utils.revise_filelist( support, in_hash[:files_support] )
-
-    # Ensure FileList patterns & revisions are resolved into full list of filepaths
-    support.resolve()
+    support = @file_path_collection_utils.revise_filelist( support, in_hash[:files_support] )
 
     support.each { |file| sources << file }
 
@@ -464,9 +471,10 @@ def collect_test_fixture_extra_link_objects(in_hash)
     # No build paths here so plugins can remap if necessary (i.e. path mapping happens at runtime)
     objects.map! { |object| object.ext(in_hash[:extension_object]) }
 
-    return { :collection_all_support => sources,
-             :collection_test_fixture_extra_link_objects => objects
-           }
+    return { 
+      :collection_all_support => sources,
+      :collection_test_fixture_extra_link_objects => objects
+    }
   end
 
 
@@ -476,10 +484,7 @@ def collect_vendor_framework_sources(in_hash)
     filelist = @file_wrapper.instantiate_file_list()
 
     # Vendor paths for frameworks
-    paths = []
-    paths << in_hash[:project_build_vendor_unity_path]
-    paths << in_hash[:project_build_vendor_cexception_path] if (in_hash[:project_use_exceptions])
-    paths << in_hash[:project_build_vendor_cmock_path]      if (in_hash[:project_use_mocks])
+    paths = get_vendor_paths(in_hash)
 
     # Collect vendor framework code files
     paths.each do |path|
@@ -489,6 +494,8 @@ def collect_vendor_framework_sources(in_hash)
     # Ensure FileList patterns & revisions are resolved into full list of filepaths
     filelist.resolve()
 
+    puts(filelist)
+
     # Extract just source file names
     filelist.each do |filepath|
       sources << File.basename(filepath)
diff --git a/lib/ceedling/configurator_setup.rb b/lib/ceedling/configurator_setup.rb
index a7b15524..2ec29328 100644
--- a/lib/ceedling/configurator_setup.rb
+++ b/lib/ceedling/configurator_setup.rb
@@ -72,6 +72,7 @@ def validate_required_sections(config)
     return true
   end
 
+
   def validate_required_section_values(config)
     validation = []
     validation << @configurator_validator.exists?(config, :project, :build_root)
@@ -82,6 +83,7 @@ def validate_required_section_values(config)
     return true
   end
 
+
   def validate_paths(config)
     valid = true
 
diff --git a/lib/ceedling/constants.rb b/lib/ceedling/constants.rb
index c8977f12..cec326bb 100644
--- a/lib/ceedling/constants.rb
+++ b/lib/ceedling/constants.rb
@@ -23,7 +23,6 @@ class TestResultsSanityChecks
   THOROUGH  = 2  # perform checks that require inside knowledge of system workings
 end
 
-
 class StdErrRedirect
   NONE = :none
   AUTO = :auto
@@ -32,7 +31,6 @@ class StdErrRedirect
   TCSH = :tcsh
 end
 
-
 unless defined?(PROJECT_ROOT)
   PROJECT_ROOT = Dir.pwd()
 end
diff --git a/lib/ceedling/file_path_collection_utils.rb b/lib/ceedling/file_path_collection_utils.rb
index 7ca8c8f7..7d3e5a9c 100644
--- a/lib/ceedling/file_path_collection_utils.rb
+++ b/lib/ceedling/file_path_collection_utils.rb
@@ -1,7 +1,6 @@
 require 'set'
 require 'pathname'
 require 'fileutils'
-require 'rake'
 require 'ceedling/file_path_utils'
 require 'ceedling/exceptions'
 
@@ -81,18 +80,49 @@ def collect_paths(paths)
   end
 
 
-  # Given a file list, add to it or remove from it considering (+:/-:) aggregation operators
+  # Given a file list, add to it or remove from it considering (+:/-:) aggregation operators.
+  # Rake's FileList does not robustly handle relative filepaths and patterns.
+  # So, we rebuild the FileList ourselves and return it.
+  # TODO: Replace FileList with our own, better version.
   def revise_filelist(list, revisions)
+    plus  = Set.new # All real, expanded directory paths to add
+    minus = Set.new # All real, expanded paths to exclude
+    
+    # Build base plus set for revised path
+    list.each do |path|
+      # Start with expanding all list entries to absolute paths
+      plus << File.expand_path( path )
+    end
+
     revisions.each do |revision|
-      # Include or exclude revision in file list
+      # Include or exclude revisions in file list
       path = FilePathUtils.no_aggregation_decorators( revision )
       
+      # Working list of revisions
+      filepaths = []
+
+      # Expand path by pattern as needed and add only filepaths to working list
+      @file_wrapper.directory_listing( path ).each do |entry|
+        filepaths << File.expand_path( entry ) if !@file_wrapper.directory?( entry )
+      end
+
+      # Handle +: / -: revisions
       if FilePathUtils.add_path?( revision )
-        list.include(path)
+        plus.merge( filepaths )
       else
-        list.exclude(path)
+        minus.merge( filepaths )
       end
     end
+
+    # Use Set subtraction operator to remove any excluded paths
+    paths = (plus - minus).to_a
+
+    paths.map! do |path|
+      # Reform path from full absolute to nice, neat relative path instead
+      (Pathname.new( path ).relative_path_from( @working_dir_path )).to_s()
+    end
+
+    return FileList.new( paths )
   end
 
 end