diff --git a/cabal2nix.cabal b/cabal2nix.cabal
--- a/cabal2nix.cabal
+++ b/cabal2nix.cabal
@@ -1,5 +1,5 @@
 name:               cabal2nix
-version:            2.14
+version:            2.14.1
 synopsis:           Convert Cabal files into Nix build instructions.
 description:
   Convert Cabal files into Nix build instructions. Users of Nix can install the latest
@@ -201,6 +201,3 @@
   build-tools:        cabal2nix
   ghc-options:        -Wall -Wcompat -Wincomplete-uni-patterns -Wincomplete-record-updates
                       -Wredundant-constraints -threaded -with-rtsopts=-K64K
-                      -- TODO: This ought to be 1K!                     ^^^
-                      --       https://github.com/NixOS/cabal2nix/issues/398
-                      --       https://github.com/feuerbach/tasty/issues/234
diff --git a/src/Distribution/Nixpkgs/Fetch.hs b/src/Distribution/Nixpkgs/Fetch.hs
--- a/src/Distribution/Nixpkgs/Fetch.hs
+++ b/src/Distribution/Nixpkgs/Fetch.hs
@@ -78,7 +78,7 @@
     let isHackagePackage = "mirror://hackage/" `L.isPrefixOf` derivUrl
         fetched = derivKind /= ""
     in if isHackagePackage then attr "sha256" $ string derivHash
-       else if not fetched then attr "src" $ string derivUrl
+       else if not fetched then attr "src" $ text derivUrl
             else vcat
                  [ text "src" <+> equals <+> text ("fetch" ++ derivKind) <+> lbrace
                  , nest 2 $ vcat