diff --git a/Changelog.md b/Changelog.md
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,3 +1,8 @@
+### 0.2.1.0
+
+- Drop support for *ghc* older than *9.0.1*.
+- Drop dependency on package *safe*.
+
 ### 0.2.0.0
 
 - Using function *shell* to properly pass the plugin's options.
diff --git a/GhcStdin.hs b/GhcStdin.hs
--- a/GhcStdin.hs
+++ b/GhcStdin.hs
@@ -1,7 +1,7 @@
 -----------------------------------------------------------------------------
 -- |
 -- Module      :  GhcStdin
--- Copyright   :  (c) Alexey Radkov 2022
+-- Copyright   :  (c) Alexey Radkov 2022-2025
 -- License     :  BSD-style
 --
 -- Maintainer  :  alexey.radkov@gmail.com
@@ -16,18 +16,13 @@
 module GhcStdin (frontendPlugin) where
 
 import           GHC.Paths
-#if MIN_VERSION_ghc(9,0,2)
 import           GHC.Plugins
-#else
-import           GhcPlugins
-#endif
 import           Control.Monad
 import qualified Data.ByteString as B
 import           System.IO
 import           System.IO.Temp
 import           System.Process
 import           System.Exit
-import           Safe
 
 -- | Frontend plugin for GHC to compile source code from the standard input.
 --
@@ -55,8 +50,8 @@
 -- putting them in a new shared library.
 --
 -- @
--- __$__ export NGX_MODULE_PATH=\/var\/lib\/nginx\/x86_64-linux-ghc-9.2.3
--- __$__ echo \'module NgxHealthcheck where import NgxExport.Healthcheck ()\' | ghc __/--frontend GhcStdin/__ /-ffrontend-opt=\"-Wall -O2 -dynamic -shared -fPIC -lHSrts_thr-ghc$(ghc --numeric-version) -L$NGX_MODULE_PATH -lngx_healthcheck_plugin -o ngx_healthcheck.so\"/ 
+-- __$__ export NGX_MODULE_PATH=\/var\/lib\/nginx\/x86_64-linux-ghc-$(ghc --numeric-version)
+-- __$__ echo \'module NgxHealthcheck where import NgxExport.Healthcheck ()\' | ghc __/--frontend GhcStdin/__ /-ffrontend-opt=\"-Wall -O2 -dynamic -shared -fPIC -flink-rts -threaded -L$NGX_MODULE_PATH -lngx_healthcheck_plugin -o ngx_healthcheck.so\"/ 
 -- [1 of 1] Compiling NgxHealthcheck   ( ghc-stdin-74de48274545714b\/ghc-stdin266454-0.hs, ghc-stdin-74de48274545714b\/ghc-stdin266454-0.o )
 -- Linking ngx_healthcheck.so ...
 -- @
@@ -78,7 +73,7 @@
             contents <- B.getContents
             B.hPutStr hsrc contents >> hFlush hsrc
             (_, _, _, h) <- createProcess $
-                shell $ q ghc ++ spc (q src) ++ spc (headDef "" flags)
+                shell $ q ghc ++ spc (q src) ++ spc (unwords flags)
             r <- waitForProcess h
             unless (r == ExitSuccess) $ exitWith r
     where q s = let q' = '\'' in q' : s ++ pure q'
diff --git a/LICENSE b/LICENSE
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright 2022 Alexey Radkov
+Copyright 2022-2025 Alexey Radkov
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -28,8 +28,8 @@
 putting them in a new shared library.
 
 ```ShellSession
-$ export NGX_MODULE_PATH=/var/lib/nginx/x86_64-linux-ghc-9.2.3
-$ echo 'module NgxHealthcheck where import NgxExport.Healthcheck ()' | ghc --frontend GhcStdin -ffrontend-opt="-Wall -O2 -dynamic -shared -fPIC -lHSrts_thr-ghc$(ghc --numeric-version) -L$NGX_MODULE_PATH -lngx_healthcheck_plugin -o ngx_healthcheck.so" 
+$ export NGX_MODULE_PATH=/var/lib/nginx/x86_64-linux-ghc-$(ghc --numeric-version)
+$ echo 'module NgxHealthcheck where import NgxExport.Healthcheck ()' | ghc --frontend GhcStdin -ffrontend-opt="-Wall -O2 -dynamic -shared -fPIC -flink-rts -threaded -L$NGX_MODULE_PATH -lngx_healthcheck_plugin -o ngx_healthcheck.so" 
 [1 of 1] Compiling NgxHealthcheck   ( ghc-stdin-74de48274545714b/ghc-stdin266454-0.hs, ghc-stdin-74de48274545714b/ghc-stdin266454-0.o )
 Linking ngx_healthcheck.so ...
 ```
@@ -41,4 +41,13 @@
 file inside it with the contents read from the standard input. Then it spawns
 another GHC process to compile this file with the options passed in
 *-ffrontend-opt*.
+
+#### Installation of the plugin
+
+To use this frontend plugin with GHC, the built module must be registered as a
+known GHC package. The simplest way to do it is running
+
+```ShellSession
+$ cabal install --lib
+```
 
diff --git a/ghc-stdin.cabal b/ghc-stdin.cabal
--- a/ghc-stdin.cabal
+++ b/ghc-stdin.cabal
@@ -1,16 +1,16 @@
 name:                  ghc-stdin
-version:               0.2.0.0
+version:               0.2.1.0
 synopsis:              Compile source code from the standard input
 description:           A frontend plugin for GHC to compile source code from
                        the standard input.
 homepage:              http://github.com/lyokha/ghc-stdin
 license:               BSD3
 license-file:          LICENSE
-extra-source-files:    Changelog.md, README.md
+extra-doc-files:       Changelog.md, README.md
 author:                Alexey Radkov <alexey.radkov@gmail.com>
 maintainer:            Alexey Radkov <alexey.radkov@gmail.com>
 stability:             experimental
-copyright:             2022 Alexey Radkov
+copyright:             2022-2025 Alexey Radkov
 category:              Development
 bug-reports:           https://github.com/lyokha/ghc-stdin/issues
 build-type:            Simple
@@ -18,21 +18,18 @@
 
 source-repository head
   type:                git
-  location:            https://github.com/lyokha/ghc-stdin
+  location:            https://github.com/lyokha/ghc-stdin.git
 
 library
   default-language:    Haskell2010
-  build-depends:       base >= 4.11.0.0 && < 5,
-                       ghc >= 8.4.1,
+  build-depends:       base >= 4.15.0.0 && < 5,
+                       ghc >= 9.0.2,
                        ghc-paths,
                        bytestring,
                        temporary,
-                       process,
-                       safe
+                       process
 
   exposed-modules:     GhcStdin
-
-  default-extensions:  CPP
 
   ghc-options:        -Wall