diff --git a/SConstruct b/SConstruct
index 69a8c06..4606bcd 100644
--- a/SConstruct
+++ b/SConstruct
@@ -1,10 +1,11 @@
 # vim: set ft=python:
-#
-# Toplevel Scons build script. This should be mostly complete and generic enough
-# for most builds.
-#
 # Eryn Wells <eryn@erynwells.me>
 
+'''
+Toplevel Scons build script. This should be mostly complete and generic enough
+for most builds.
+'''
+
 import logging
 
 setup_logging()
diff --git a/site_scons/site_init.py b/site_scons/site_init.py
index cb25ecf..12b7b3c 100644
--- a/site_scons/site_init.py
+++ b/site_scons/site_init.py
@@ -184,7 +184,7 @@ class Environment(SCons.Environment.Environment):
     def _append_custom_tools(self, kwargs):
         '''Add custom tools to the `kwargs`.'''
         tools = kwargs.setdefault('tools', ['default'])
-        for tool in ['lib', 'test', 'program', 'sconscript']:
+        for tool in ['lib', 'test', 'program', 'sconscript', 'swiftc']:
             if tool in tools:
                 continue
             tools.append(tool)
diff --git a/site_scons/site_tools/sconscript.py b/site_scons/site_tools/sconscript.py
index b898481..12c0015 100644
--- a/site_scons/site_tools/sconscript.py
+++ b/site_scons/site_tools/sconscript.py
@@ -9,12 +9,15 @@ import SCons.Script
 
 def _do_sconscript(env):
     original_sconscript = env.SConscript
-    
+
     def sconscript(env, sconscript, clone=False, *args, **kwargs):
         exports = {'Library': env.Library,
                    'StaticLibrary': env.StaticLibrary,
                    'SharedLibrary': env.SharedLibrary,
-                   'Program': env.Program}
+                   'Program': env.Program,
+
+                   'Append': env.Append,
+                   'Replace': env.Replace}
         SCons.Script._SConscript.GlobalDict.update(exports)
         env.log('Reading {}'.format(sconscript))
         return original_sconscript(sconscript,
diff --git a/site_scons/site_tools/swiftc.py b/site_scons/site_tools/swiftc.py
new file mode 100644
index 0000000..5d2766d
--- /dev/null
+++ b/site_scons/site_tools/swiftc.py
@@ -0,0 +1,33 @@
+# swiftc.py
+# vim: set ft=python:
+# Eryn Wells <eryn@erynwells.me>
+
+'''
+SCons plugin for building Swift files with swiftc.
+'''
+
+import SCons.Action
+import SCons.Tool
+import SCons.Util
+
+SwiftSuffix = '.swift'
+SwiftAction = SCons.Action.Action("$SWIFTCCOM", "$SWIFTCCOMSTR")
+
+compilers = ['swiftc']
+
+def generate(env):
+    static_obj, shared_obj = SCons.Tool.createObjBuilders(env)
+    static_obj.add_action(SwiftSuffix, SwiftAction)
+    static_obj.add_emitter(SwiftSuffix, SCons.Defaults.SharedObjectEmitter)
+    shared_obj.add_action(SwiftSuffix, SwiftAction)
+    shared_obj.add_emitter(SwiftSuffix, SCons.Defaults.SharedObjectEmitter)
+
+    if 'SWIFTC' not in env:
+        compiler = env.Detect(compilers)
+        env['SWIFTC'] = compiler if compiler else compilers[0]
+    env['SWIFTFLAGS'] = SCons.Util.CLVar('')
+    env['SWIFTCCOM']   = '$SWIFTC -o $TARGET -c $SWIFTFLAGS $SOURCES'
+    env['SWIFTFILESUFFIX'] = SwiftSuffix
+
+def exists(env):
+    return env.Detect(compilers)