diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,8 @@
 # Release history for stack-clean-old-work
 
+## 0.4.1 (2021-10-05)
+- --help now mentions --delete and a link to README
+
 ## 0.4 (2021-09-26)
 - dryrun is now default: use --delete for actual removal
   (suggested by @andreasabel #6)
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -4,9 +4,9 @@
 snapshot builds and ghc versions to recover diskspace.
 
 ## Usage
-```
-stack-clean-old [size|list|remove|keep-minor|purge-older|delete-work] [(-p|--project) | (-g|--ghc)] [--delete] [GHCVER]
-```
+`stack-clean-old [size|list|remove|keep-minor|purge-older|delete-work] [-d|--delete] [(-p|--project) | (-g|--ghc)] [GHCVER]
+`
+
 Options:
 
 - `--project` (default in a stack project dir): act on `.stack-work/install/`
@@ -42,16 +42,17 @@
 
 ### Example usage
 To remove project builds for ghc-8.2.2:
-```
+```ShellSession
 $ stack-clean-old list
 154M  8.2.2  (5 dirs)
 154M  8.4.4  (5 dirs)
 163M  8.6.5  (5 dirs)
 $ stack-clean-old remove --delete -p 8.2.2
+:
 ```
 
 Remove stack ghc-8.4 snapshot builds and compilers before 8.4.4:
-```
+```ShellSession
 $ stack-clean-old list -g 8.4
 421M  8.4.1  (7 dirs)
 368M  8.4.2  (6 dirs)
@@ -83,8 +84,34 @@
 (seems same as `stack clean --full`).
 
 `stack-clean-old delete-work --all` works from outside stack projects:
-please use with care.
+please use with care with `--delete`.
 
+### Help output
+(Note you can also run this tool via `stack clean-old`.)
+
+To get help you can run `stack-clean-old --help` or just:
+```ShellSession
+$ stack-clean-old
+Stack clean up tool
+
+Usage: stack-clean-old [--version] COMMAND
+  Cleans away old stack-work builds (and pending: stack snapshots) to recover
+  diskspace. Use the --delete option to perform actual removals.
+  https://github.com/juhp/stack-clean-old#readme
+
+Available options:
+  -h,--help                Show this help text
+  --version                Show version
+
+Available commands:
+  size                     Total size
+  list                     List sizes per ghc version
+  remove                   Remove for a ghc version
+  keep-minor               Remove for previous ghc minor versions
+  purge-older              Purge older builds in .stack-work/install
+  delete-work              Remove project's .stack-work subdirs recursively
+```
+
 ## Installation
 
 Run `stack install` or `cabal install`
@@ -101,7 +128,7 @@
 
 Project: https://github.com/juhp/stack-clean-old
 
-## Warning disclaimer
+## Disclaimer
 Use at your own risk: the author takes no responsibility for any loss or
 damaged caused by using this tool.
 
diff --git a/src/Main.hs b/src/Main.hs
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -31,7 +31,7 @@
 main = do
   hSetBuffering stdout NoBuffering
   simpleCmdArgs (Just version) "Stack clean up tool"
-    "Cleans away old stack-work builds (and pending: stack snapshots) to recover diskspace." $
+    "Cleans away old stack-work builds (and pending: stack snapshots) to recover diskspace. Use the --delete option to perform actual removals. https://github.com/juhp/stack-clean-old#readme" $
     subcommands
     [ Subcommand "size" "Total size" $
       sizeCmd <$> modeOpt <*> recursionOpt <*> notHumanOpt
diff --git a/stack-clean-old.cabal b/stack-clean-old.cabal
--- a/stack-clean-old.cabal
+++ b/stack-clean-old.cabal
@@ -1,5 +1,5 @@
 name:                stack-clean-old
-version:             0.4
+version:             0.4.1
 synopsis:            Clean away old stack build artefacts
 description:
         A tool for removing old .stack-work/install builds and