release.hs: enable offical release flags explicitly

Works around https://github.com/commercialhaskell/stack/issues/4960

etc/scripts/release.hs

@@ -199,12 +199,12 @@ rules global@Global{..} args = do
                     c
             -- 'stack.cabal' is autogenerated by 'stack', delete to ensure not stale
             _ <- liftIO $ tryJust (guard . isDoesNotExistError) (removeFile "stack.cabal")
-            () <- cmd0 "install" gBuildArgs $ concat $ concat
-                [["--pedantic --no-haddock-deps --flag stack:integration-tests"]
+            () <- cmd0 "install" gBuildArgs integrationTestFlagArgs $ concat $ concat
+                [["--pedantic --no-haddock-deps "]
                 ,[" --haddock" | gTestHaddocks]
                 ,[" stack"]]
             let cmd' c = cmd (AddPath [tmpDir] []) stackProgName (stackArgs global) c
-            () <- cmd' "test" gBuildArgs "--pedantic --flag stack:integration-tests --exec stack-integration-test stack"
+            () <- cmd' "test" gBuildArgs integrationTestFlagArgs "--pedantic --exec stack-integration-test stack"
             return ()
         copyFileChanged (releaseBinDir </> binaryName </> stackExeFileName) out
 
@@ -300,13 +300,21 @@ rules global@Global{..} args = do
                 ["--local-bin-path=" ++ takeDirectory out]
                 "install"
                 gBuildArgs
+                integrationTestFlagArgs
                 "--pedantic"
-                "--flag stack:integration-tests"
                 "stack")
             (tryJust (guard . isDoesNotExistError) (removeFile out))
 
   where
 
+    integrationTestFlagArgs =
+        -- Explicitly enabling 'hide-dependency-versions' and 'supported-build' to work around
+        -- https://github.com/commercialhaskell/stack/issues/4960
+        [ "--flag=stack:integration-tests"
+        , "--flag=stack:hide-dependency-versions"
+        , "--flag=stack:supported-build"
+        ]
+
     getBinaryPkgStageFiles = do
         docFiles <- getDocFiles
         let stageFiles = concat