diff --git a/lackey.cabal b/lackey.cabal
--- a/lackey.cabal
+++ b/lackey.cabal
@@ -1,6 +1,6 @@
 cabal-version: 2.2
 name: lackey
-version: 2.0.0.8
+version: 2.0.0.9
 synopsis: Generate Ruby clients from Servant APIs.
 description: Lackey generates Ruby clients from Servant APIs.
 bug-reports: https://github.com/tfausak/lackey/issues
@@ -21,11 +21,10 @@
 
 flag pedantic
   default: False
-  description: Enables @-Werror@, which turns warnings into errors.
   manual: True
 
 common library
-  build-depends: base ^>=4.18.0.0 || ^>=4.19.0.0 || ^>=4.20.0.0
+  build-depends: base ^>=4.19.0.0 || ^>=4.20.0.0 || ^>=4.21.0.0
   default-language: Haskell2010
   ghc-options:
     -Weverything
@@ -53,6 +52,7 @@
     servant-foreign ^>=0.16,
     text ^>=2.0.2 || ^>=2.1,
 
+  -- cabal-gild: discover source/library
   exposed-modules: Lackey
   hs-source-dirs: source/library
 
diff --git a/source/test-suite/Main.hs b/source/test-suite/Main.hs
--- a/source/test-suite/Main.hs
+++ b/source/test-suite/Main.hs
@@ -45,8 +45,7 @@
         let api =
               Proxy.Proxy ::
                 Proxy.Proxy
-                  ( Servant.Get '[Servant.JSON] () Servant.:<|> Servant.Delete '[Servant.JSON] ()
-                  )
+                  (Servant.Get '[Servant.JSON] () Servant.:<|> Servant.Delete '[Servant.JSON] ())
         Lackey.rubyForAPI api
           `Hspec.shouldBe` Text.concat
             [ ruby "get" "" "get" "" "" False,
@@ -58,8 +57,7 @@
         let api =
               Proxy.Proxy ::
                 Proxy.Proxy
-                  ( Servant.Capture "id" () Servant.:> Servant.Get '[Servant.JSON] ()
-                  )
+                  (Servant.Capture "id" () Servant.:> Servant.Get '[Servant.JSON] ())
         Lackey.rubyForAPI api
           `Hspec.shouldBe` ruby "get_by_id" ",id" "get" "#{id}" "" False
 
@@ -67,8 +65,7 @@
         let api =
               Proxy.Proxy ::
                 Proxy.Proxy
-                  ( Servant.QueryFlag "flag" Servant.:> Servant.Get '[Servant.JSON] ()
-                  )
+                  (Servant.QueryFlag "flag" Servant.:> Servant.Get '[Servant.JSON] ())
         Lackey.rubyForAPI api
           `Hspec.shouldBe` ruby
             "get"
@@ -82,8 +79,7 @@
         let api =
               Proxy.Proxy ::
                 Proxy.Proxy
-                  ( Servant.QueryParam "param" () Servant.:> Servant.Get '[Servant.JSON] ()
-                  )
+                  (Servant.QueryParam "param" () Servant.:> Servant.Get '[Servant.JSON] ())
         Lackey.rubyForAPI api
           `Hspec.shouldBe` ruby
             "get"
@@ -97,8 +93,7 @@
         let api =
               Proxy.Proxy ::
                 Proxy.Proxy
-                  ( Servant.QueryParams "params" () Servant.:> Servant.Get '[Servant.JSON] ()
-                  )
+                  (Servant.QueryParams "params" () Servant.:> Servant.Get '[Servant.JSON] ())
         Lackey.rubyForAPI api
           `Hspec.shouldBe` ruby
             "get"
@@ -112,8 +107,7 @@
         let api =
               Proxy.Proxy ::
                 Proxy.Proxy
-                  ( Servant.ReqBody '[Servant.JSON] () Servant.:> Servant.Get '[Servant.JSON] ()
-                  )
+                  (Servant.ReqBody '[Servant.JSON] () Servant.:> Servant.Get '[Servant.JSON] ())
         Lackey.rubyForAPI api
           `Hspec.shouldBe` ruby "get" ",body" "get" "" "" True
 
@@ -121,8 +115,7 @@
         let api =
               Proxy.Proxy ::
                 Proxy.Proxy
-                  ( Servant.Header "cookie" () Servant.:> Servant.Get '[Servant.JSON] ()
-                  )
+                  (Servant.Header "cookie" () Servant.:> Servant.Get '[Servant.JSON] ())
         Lackey.rubyForAPI api
           `Hspec.shouldBe` ruby
             "get"
@@ -144,8 +137,7 @@
         let api =
               Proxy.Proxy ::
                 Proxy.Proxy
-                  ( Servant.Capture "segment" () Servant.:> Servant.ReqBody '[Servant.JSON] () Servant.:> Servant.Get '[Servant.JSON] ()
-                  )
+                  (Servant.Capture "segment" () Servant.:> Servant.ReqBody '[Servant.JSON] () Servant.:> Servant.Get '[Servant.JSON] ())
         Lackey.rubyForAPI api
           `Hspec.shouldBe` ruby
             "get_by_segment"
@@ -159,8 +151,7 @@
         let api =
               Proxy.Proxy ::
                 Proxy.Proxy
-                  ( Servant.QueryFlag "flag" Servant.:> Servant.ReqBody '[Servant.JSON] () Servant.:> Servant.Get '[Servant.JSON] ()
-                  )
+                  (Servant.QueryFlag "flag" Servant.:> Servant.ReqBody '[Servant.JSON] () Servant.:> Servant.Get '[Servant.JSON] ())
         Lackey.rubyForAPI api
           `Hspec.shouldBe` ruby
             "get"
@@ -182,8 +173,7 @@
         let api =
               Proxy.Proxy ::
                 Proxy.Proxy
-                  ( Servant.Capture "A!" () Servant.:> Servant.Get '[Servant.JSON] ()
-                  )
+                  (Servant.Capture "A!" () Servant.:> Servant.Get '[Servant.JSON] ())
         Lackey.rubyForAPI api
           `Hspec.shouldBe` ruby "get_by_A!" ",a_" "get" "#{a_}" "" False
 
@@ -191,8 +181,7 @@
         let api =
               Proxy.Proxy ::
                 Proxy.Proxy
-                  ( Servant.QueryFlag "A!" Servant.:> Servant.Get '[Servant.JSON] ()
-                  )
+                  (Servant.QueryFlag "A!" Servant.:> Servant.Get '[Servant.JSON] ())
         Lackey.rubyForAPI api
           `Hspec.shouldBe` ruby "get" ",a_: nil" "get" "?A!=#{a_}" "" False
 
@@ -200,8 +189,7 @@
         let api =
               Proxy.Proxy ::
                 Proxy.Proxy
-                  ( Servant.QueryParam "A!" () Servant.:> Servant.Get '[Servant.JSON] ()
-                  )
+                  (Servant.QueryParam "A!" () Servant.:> Servant.Get '[Servant.JSON] ())
         Lackey.rubyForAPI api
           `Hspec.shouldBe` ruby "get" ",a_: nil" "get" "?A!=#{a_}" "" False
 
@@ -209,8 +197,7 @@
         let api =
               Proxy.Proxy ::
                 Proxy.Proxy
-                  ( Servant.QueryParams "A!" () Servant.:> Servant.Get '[Servant.JSON] ()
-                  )
+                  (Servant.QueryParams "A!" () Servant.:> Servant.Get '[Servant.JSON] ())
         Lackey.rubyForAPI api
           `Hspec.shouldBe` ruby "get" ",a_: nil" "get" "?A!=#{a_}" "" False
 
@@ -218,8 +205,7 @@
         let api =
               Proxy.Proxy ::
                 Proxy.Proxy
-                  ( Servant.Header "A!" () Servant.:> Servant.Get '[Servant.JSON] ()
-                  )
+                  (Servant.Header "A!" () Servant.:> Servant.Get '[Servant.JSON] ())
         Lackey.rubyForAPI api
           `Hspec.shouldBe` ruby "get" ",a_: nil" "get" "" "\"A!\"=>a_" False