diff --git a/app-casa-curator/Main.hs b/app-casa-curator/Main.hs
index 2cbed27..2c1ff70 100644
--- a/app-casa-curator/Main.hs
+++ b/app-casa-curator/Main.hs
@@ -444,7 +444,11 @@ downloadHackagePackage continuousConfig count (i, (hackageCabalId, rpli)) = do
                threadDelay (1000 * 1000)
                attempt
              StatusCodeException r _
-               | getResponseStatusCode r == 403 -> logit e
+               -- FIXME: Ignoring 500s from Hackage because of
+               -- https://github.com/haskell/hackage-server/issues/1023
+               -- Also not sure about 403s. They seem suspicious. 410s seem
+               -- legit, though.
+               | getResponseStatusCode r `elem` [403, 410, 500] -> logit e
              _ -> throwM e)
 
 -- | Record that we've populated pantry with a snapshot.
diff --git a/app-curator/Main.hs b/app-curator/Main.hs
index dc9881b..ac55818 100644
--- a/app-curator/Main.hs
+++ b/app-curator/Main.hs
@@ -73,7 +73,7 @@ options =
       addCommand "upload-docs"
                  "Upload documentation to an S3 bucket"
                  uploadDocs'
-                 parseTarget
+                 parseUploadDocsArgs
       addCommand "upload-github"
                  "Commit and push snapshot definition to Github repository"
                  uploadGithub'
@@ -95,6 +95,14 @@ options =
                               <> metavar "TARGET"
                               <> help "Target Stackage snapshot 'lts-MM.NN' or 'nightly-YYYY-MM-DD'"
                                )
+    parseUploadDocsArgs = UploadArgs <$> parseTarget <*>
+        strOption (mconcat
+            [ long "bucket"
+            , metavar "BUCKET"
+            , value "haddock.stackage.org"
+            , showDefault
+            , help "Target bucket name. All other AWS params are taken from environment variables."
+            ])
     nightly = maybeReader $ \s -> do
       s' <- stripPrefix "nightly-" s
       TargetNightly <$> parseTimeM False defaultTimeLocale "%Y-%m-%d" s'
@@ -114,6 +122,8 @@ options =
       <*> strOption (long "lts-haskell" <> metavar "DIR")
       <*> strOption (long "stackage-nightly" <> metavar "DIR")
 
+data UploadArgs = UploadArgs Target Text
+
 main :: IO ()
 main = runPantryApp $ do
   ((), runCmd) <- liftIO options
@@ -283,8 +293,8 @@ hackageDistro target = do
         Map.mapMaybe (snapshotVersion . spLocation) (snapshotPackages snapshot')
   uploadHackageDistro target packageVersions
 
-uploadDocs' :: Target -> RIO PantryApp ()
-uploadDocs' target = do
+uploadDocs' :: UploadArgs -> RIO PantryApp ()
+uploadDocs' (UploadArgs target bucket) = do
   docsDir <- fmap (T.unpack . T.dropSuffix "\n" . decodeUtf8Lenient . BL.toStrict) $
     withWorkingDir unpackDir $ proc "stack" (words "path --local-doc-root") readProcessStdout_
   logInfo "Uploading docs to S3"
@@ -295,7 +305,7 @@ uploadDocs' target = do
             in "nightly-" <> fromString date
           TargetLts x y ->
             "lts-" <> display x <> "." <> display y
-  uploadDocs docsDir prefix haddockBucket
+  uploadDocs docsDir prefix bucket
 
 uploadGithub' :: Target -> RIO PantryApp ()
 uploadGithub' target = do
diff --git a/src/Curator/Constants.hs b/src/Curator/Constants.hs
index d0a0204..bfe0e83 100644
--- a/src/Curator/Constants.hs
+++ b/src/Curator/Constants.hs
@@ -3,7 +3,6 @@ module Curator.Constants
     , constraintsFilename
     , snapshotsRepo
     , constraintsRepo
-    , haddockBucket
     ) where
 
 import RIO (Text, fromString)
@@ -19,6 +18,3 @@ snapshotsRepo = "commercialhaskell/stackage-snapshots"
 
 constraintsRepo :: String
 constraintsRepo = "commercialhaskell/stackage-constraints"
-
-haddockBucket :: Text
-haddockBucket = fromString "haddock.stackage.org"
diff --git a/stack.yaml b/stack.yaml
index a518d36..98871cc 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,4 +1,6 @@
 resolver: lts-21.25
+nix:
+  packages: [ pkg-config libz ]
 
 # For local dev
 # - ../pantry