diff --git a/MODULE.md b/MODULE.md
index 54ebb47..b4e0ec0 100644
--- a/MODULE.md
+++ b/MODULE.md
@@ -1,5 +1,22 @@
 # Module Documentation
 
+## Module GulpPurescript.Buffer
+
+#### `Buffer`
+
+``` purescript
+data Buffer
+```
+
+
+#### `mkBufferFromString`
+
+``` purescript
+mkBufferFromString :: String -> Buffer
+```
+
+
+
 ## Module GulpPurescript.ChildProcess
 
 #### `ChildProcess`
@@ -60,7 +77,7 @@ mkPluginError :: String -> String -> Error
 #### `mkFile`
 
 ``` purescript
-mkFile :: String -> String -> File
+mkFile :: String -> Buffer -> File
 ```
 
 
@@ -166,6 +183,13 @@ platform :: forall eff. Eff (os :: OS | eff) (Maybe Platform)
 
 ## Module GulpPurescript.Options
 
+#### `isForeignEither`
+
+``` purescript
+instance isForeignEither :: (IsForeign a, IsForeign b) => IsForeign (Either a b)
+```
+
+
 #### `isForeignPsc`
 
 ``` purescript
@@ -201,6 +225,13 @@ pscOptions :: Foreign -> [String]
 ```
 
 
+#### `pscOptionsNoOutput`
+
+``` purescript
+pscOptionsNoOutput :: Foreign -> Tuple (Maybe String) [String]
+```
+
+
 #### `pscMakeOptions`
 
 ``` purescript
diff --git a/README.md b/README.md
index 8291d01..6320f4d 100644
--- a/README.md
+++ b/README.md
@@ -78,7 +78,7 @@ Sets one or more `--module=<string>` that enables dead code elimination, removin
 
 ###### `codegen` (String Array)
 
-Sets one or more `--codegen=<string>` that generates code and extenrs for the specified modules.
+Sets one or more `--codegen=<string>` that generates code and externs for the specified modules.
 
 ###### `output` (String)
 
@@ -88,6 +88,10 @@ Sets the path value of the [File](https://github.com/wearefractal/vinyl) passed
 
 Toggles `--no-prefix` that does not include the comment header.
 
+###### `ffi` (String Array)
+
+Sets one or more `--ffi=<string>` that specifies the location of files for code that is included with a `foreign import` in the PureScript source.
+
 ### `purescript.pscMake(options)`
 
 Invokes the `psc-make` command. The following options are supported.
@@ -124,6 +128,10 @@ Sets `--output=<string>` the specifies the output directory, `output` by default
 
 Toggles `--no-prefix` that does not include the comment header.
 
+###### `ffi` (String Array)
+
+Sets one or more `--ffi=<string>` that specifies the location of files for code that is included with a `foreign import` in the PureScript source.
+
 ### `purescript.pscDocs(options)`
 
 Invokes the `pscDocs` command. The following options are supported.
diff --git a/src/Options.purs b/src/Options.purs
index 989ea44..323866c 100644
--- a/src/Options.purs
+++ b/src/Options.purs
@@ -72,6 +72,10 @@ formatOpt = "format"
 
 formatKey = formatOpt
 
+ffiOpt = "ffi"
+
+ffiKey = ffiOpt
+
 newtype Psc
   = Psc { noPrelude :: NullOrUndefined Boolean
         , noTco :: NullOrUndefined Boolean
@@ -86,6 +90,7 @@ newtype Psc
         , output :: NullOrUndefined String
         , externs :: NullOrUndefined String
         , noPrefix :: NullOrUndefined Boolean
+        , ffi :: NullOrUndefined [String]
         }
 
 newtype PscMake
@@ -97,6 +102,7 @@ newtype PscMake
             , comments :: NullOrUndefined Boolean
             , noPrefix :: NullOrUndefined Boolean
             , output :: NullOrUndefined String
+            , ffi :: NullOrUndefined [String]
             }
 
 newtype PscDocs
@@ -110,7 +116,7 @@ instance isForeignEither :: (IsForeign a, IsForeign b) => IsForeign (Either a b)
 
 instance isForeignPsc :: IsForeign Psc where
   read obj =
-    (\a b c d e f g h i j k l m ->
+    (\a b c d e f g h i j k l m o ->
     Psc { noPrelude: a
         , noTco: b
         , noMagicDo: c
@@ -124,6 +130,7 @@ instance isForeignPsc :: IsForeign Psc where
         , output: k
         , externs: l
         , noPrefix: m
+        , ffi: o
         }) <$> readProp noPreludeKey obj
            <*> readProp noTcoKey obj
            <*> readProp noMagicDoKey obj
@@ -137,10 +144,11 @@ instance isForeignPsc :: IsForeign Psc where
            <*> readProp outputKey obj
            <*> readProp externsKey obj
            <*> readProp noPrefixKey obj
+           <*> readProp ffiKey obj
 
 instance isForeignPscMake :: IsForeign PscMake where
   read obj =
-    (\a b c d e f g h ->
+    (\a b c d e f g h i ->
     PscMake { output: a
             , noPrelude: b
             , noTco: c
@@ -149,6 +157,7 @@ instance isForeignPscMake :: IsForeign PscMake where
             , verboseErrors: f
             , comments: g
             , noPrefix: h
+            , ffi: i
             }) <$> readProp outputKey obj
                <*> readProp noPreludeKey obj
                <*> readProp noTcoKey obj
@@ -157,6 +166,7 @@ instance isForeignPscMake :: IsForeign PscMake where
                <*> readProp verboseErrorsKey obj
                <*> readProp commentsKey obj
                <*> readProp noPrefixKey obj
+               <*> readProp ffiKey obj
 
 instance isForeignPscDocs :: IsForeign PscDocs where
   read obj = (\a -> PscDocs { format: a }) <$> readProp formatKey obj
@@ -204,7 +214,8 @@ foldPscOptions (Psc a) = mkBoolean noPreludeOpt a.noPrelude <>
                          mkStringArray codegenOpt a.codegen <>
                          mkString outputOpt a.output <>
                          mkString externsOpt a.externs <>
-                         mkBoolean noPrefixOpt a.noPrefix
+                         mkBoolean noPrefixOpt a.noPrefix <>
+                         mkStringArray ffiOpt a.ffi
 
 pscOptions :: Foreign -> [String]
 pscOptions opts = either (const []) foldPscOptions parsed
@@ -226,7 +237,8 @@ pscMakeOptions opts = either (const []) fold parsed
                            mkBoolean noOptsOpt a.noOpts <>
                            mkBoolean verboseErrorsOpt a.verboseErrors <>
                            mkBoolean commentsOpt a.comments <>
-                           mkBoolean noPrefixOpt a.noPrefix
+                           mkBoolean noPrefixOpt a.noPrefix <>
+                           mkStringArray ffiOpt a.ffi
 
 pscDocsOptions :: Foreign -> [String]
 pscDocsOptions opts = either (const []) fold parsed