diff --git a/src/Data/Source.hs b/src/Data/Source.hs
index 4ec30c708..deadfccdb 100644
--- a/src/Data/Source.hs
+++ b/src/Data/Source.hs
@@ -11,7 +11,7 @@ import Prologue
 import Test.LeanCheck
 
 -- | The contents of a source file, represented as a ByteString.
-newtype Source = Source { sourceText :: B.ByteString }
+newtype Source = Source { sourceBytes :: B.ByteString }
   deriving (Eq, IsString, Show)
 
 
@@ -26,16 +26,16 @@ slice range = take . drop
         take = Data.Source.take (rangeLength range)
 
 drop :: Int -> Source -> Source
-drop i = Source . drop . sourceText
+drop i = Source . drop . sourceBytes
   where drop = B.drop i
 
 take :: Int -> Source -> Source
-take i = Source . take . sourceText
+take i = Source . take . sourceBytes
   where take = B.take i
 
 -- | Return the ByteString contained in the 'Source'.
 toText :: Source -> Text
-toText = decodeUtf8 . sourceText
+toText = decodeUtf8 . sourceBytes
 
 -- | Split the source into the longest prefix of elements that do not satisfy the predicate and the rest without copying.
 break :: (Word8 -> Bool) -> Source -> (Source, Source)
@@ -43,7 +43,7 @@ break predicate (Source text) = let (start, remainder) = B.break predicate text
 
 -- | Split the contents of the source after newlines.
 actualLines :: Source -> [Source]
-actualLines = fmap Source . actualLines' . sourceText
+actualLines = fmap Source . actualLines' . sourceBytes
   where actualLines' text
           | B.null text = [ text ]
           | otherwise = case B.break (== toEnum (fromEnum '\n')) text of
@@ -54,12 +54,12 @@ actualLines = fmap Source . actualLines' . sourceText
 -- | Compute the 'Range's of each line in a 'Source'.
 actualLineRanges :: Source -> [Range]
 actualLineRanges = Prologue.drop 1 . scanl toRange (Range 0 0) . actualLines
-  where toRange previous string = Range (end previous) $ end previous + B.length (sourceText string)
+  where toRange previous source = Range (end previous) $ end previous + sourceLength source
 
 -- | Compute the 'Range's of each line in a 'Range' of a 'Source'.
 actualLineRangesWithin :: Range -> Source -> [Range]
 actualLineRangesWithin range = Prologue.drop 1 . scanl toRange (Range (start range) (start range)) . actualLines . slice range
-  where toRange previous string = Range (end previous) $ end previous + B.length (sourceText string)
+  where toRange previous source = Range (end previous) $ end previous + sourceLength source
 
 -- | Compute the byte 'Range' corresponding to a given 'Span' in a 'Source'.
 spanToRange :: Source -> Span -> Range
@@ -85,7 +85,7 @@ rangeToSpan source (Range rangeStart rangeEnd) = Span startPos endPos
 
 -- | Return a 'Range' that covers the entire text.
 totalRange :: Source -> Range
-totalRange = Range 0 . B.length . sourceText
+totalRange = Range 0 . B.length . sourceBytes
 
 -- | Return a 'Span' that covers the entire text.
 totalSpan :: Source -> Span
@@ -94,10 +94,10 @@ totalSpan source = Span (Pos 1 1) (Pos (length ranges) (succ (end lastRange - st
         Just lastRange = getLast (foldMap (Last . Just) ranges)
 
 sourceLength :: Source -> Int
-sourceLength = B.length . sourceText
+sourceLength = B.length . sourceBytes
 
 nullSource :: Source -> Bool
-nullSource = B.null . sourceText
+nullSource = B.null . sourceBytes
 
 instance Semigroup Source where
   Source a <> Source b = Source (a <> b)
@@ -120,4 +120,4 @@ instance Listable ListableByteString where
             , [chr 0xa0..chr 0x24f] ] -- Non-ASCII.
 
 instance StringConv Source ByteString where
-  strConv _ = sourceText
+  strConv _ = sourceBytes
diff --git a/src/Data/Syntax/Assignment.hs b/src/Data/Syntax/Assignment.hs
index addc8448d..6b0831b9f 100644
--- a/src/Data/Syntax/Assignment.hs
+++ b/src/Data/Syntax/Assignment.hs
@@ -95,7 +95,7 @@ import Data.Ix (inRange)
 import Data.List.NonEmpty (nonEmpty)
 import Data.Range (offsetRange)
 import Data.Record
-import qualified Data.Source as Source (Source(..), drop, slice, sourceText, actualLines)
+import qualified Data.Source as Source (Source(..), drop, slice, sourceBytes, actualLines)
 import GHC.Stack
 import qualified Info
 import Prologue hiding (Alt, get, Location, state)
@@ -188,7 +188,7 @@ printError source error@Error{..}
     withSGRCode [SetColor Foreground Vivid Red] . putStrErr . (showString "error") . showString ": " . showExpectation error . showChar '\n' . showString (toS context) . (if isSuffixOf "\n" context then identity else showChar '\n') . showString (replicate (succ (Info.posColumn errorPos + lineNumberDigits)) ' ') $ ""
     withSGRCode [SetColor Foreground Vivid Green] . putStrErr . (showChar '^') . showChar '\n' . showString (prettyCallStack callStack) $ ""
 
-  where context = maybe "\n" (Source.sourceText . sconcat) (nonEmpty [ Source.Source (toS (showLineNumber i)) <> Source.Source ": " <> l | (i, l) <- zip [1..] (Source.actualLines source), inRange (Info.posLine errorPos - 2, Info.posLine errorPos) i ])
+  where context = maybe "\n" (Source.sourceBytes . sconcat) (nonEmpty [ Source.Source (toS (showLineNumber i)) <> Source.Source ": " <> l | (i, l) <- zip [1..] (Source.actualLines source), inRange (Info.posLine errorPos - 2, Info.posLine errorPos) i ])
         showLineNumber n = let s = show n in replicate (lineNumberDigits - length s) ' ' <> s
         lineNumberDigits = succ (floor (logBase 10 (fromIntegral (Info.posLine errorPos) :: Double)))
         putStrErr = hPutStr stderr
@@ -243,7 +243,7 @@ runAssignment toRecord = iterFreer run . fmap ((pure .) . (,))
           (Location, node : _) -> yield (rtail (toRecord (F.project node))) state
           (Location, []) -> yield (Info.Range stateOffset stateOffset :. Info.Span statePos statePos :. Nil) state
           (Project projection, node : _) -> yield (projection (F.project node)) state
-          (Source, node : _) -> yield (Source.sourceText (Source.slice (offsetRange (Info.byteRange (toRecord (F.project node))) (negate stateOffset)) stateSource)) (advanceState (rtail . toRecord) state)
+          (Source, node : _) -> yield (Source.sourceBytes (Source.slice (offsetRange (Info.byteRange (toRecord (F.project node))) (negate stateOffset)) stateSource)) (advanceState (rtail . toRecord) state)
           (Children childAssignment, node : _) -> case assignAllFrom toRecord childAssignment state { stateNodes = toList (F.project node) } of
             Result _ (Just (a, state')) -> yield a (advanceState (rtail . toRecord) state' { stateNodes = stateNodes })
             Result err Nothing -> Result err Nothing
diff --git a/src/Renderer/Patch.hs b/src/Renderer/Patch.hs
index 3de21171d..eadb7a0fa 100644
--- a/src/Renderer/Patch.hs
+++ b/src/Renderer/Patch.hs
@@ -90,7 +90,7 @@ showLines source prefix lines = fromMaybe "" . mconcat $ fmap prepend . showLine
 
 -- | Given a source, render a line to a string.
 showLine :: Functor f => HasField fields Range => Source -> Maybe (SplitDiff f (Record fields)) -> Maybe ByteString
-showLine source line | Just line <- line = Just . sourceText . (`slice` source) $ getRange line
+showLine source line | Just line <- line = Just . sourceBytes . (`slice` source) $ getRange line
                      | otherwise = Nothing
 
 -- | Returns the header given two source blobs and a hunk.