diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
-# ip6addr ![CI](https://github.com/MichelBoucey/ip6addr/actions/workflows/haskell-ci.yml/badge.svg)
+# ip6addr ![CI](https://github.com/MichelBoucey/ip6addr/actions/workflows/haskell-ci.yml/badge.svg) [![Hackage](https://img.shields.io/hackage/v/ip6addr.svg)](https://hackage.haskell.org/package/ip6addr)
 
-## 1. Goal
+## 1. Purpose
 
 `ip6addr` is a commandline tool that validates and generates IPv6 address text representations, based upon [the library IPv6Addr](https://github.com/MichelBoucey/IPv6Addr) :
 
@@ -11,9 +11,31 @@
 * Windows UNC path name
 * Random generation for test purpose  
 
-## 2. Usage
+## 2. Install
 
+### 2.1. With Cabal
+
 ```
+cabal install ip6addr
+```
+
+### 2.2. With Nix
+
+#### 2.2.1. From sources
+
+```
+nix-build
+```
+
+#### 2.2.2. From Nix Packages collection
+
+```
+nix profile install nixpkgs#haskellPackages.ip6addr
+```
+
+## 3. Usage
+
+```
 ip6addr v2.0.0 (c) Michel Boucey 2011-2024
 
 Usage: ip6addr [-v|--version]
@@ -41,7 +63,7 @@
 
 *N.B.* : In version 2, flags and arguments have changed from version 1, but the main features are identical.
 
-## 3. Examples
+## 4. Examples
 
 ```bash
     [user@box ~]$ ip6addr 0:0::FFFF:192.0.2.128  
diff --git a/app/ip6addr.hs b/app/ip6addr.hs
--- a/app/ip6addr.hs
+++ b/app/ip6addr.hs
@@ -17,7 +17,7 @@
 showVer :: String
 showVer = "ip6addr v"
        <> showVersion version
-       <> " (c) Michel Boucey 2011-2024"
+       <> " (c) Michel Boucey 2011-2025"
 
 main :: IO ()
 main = do
diff --git a/ip6addr.cabal b/ip6addr.cabal
--- a/ip6addr.cabal
+++ b/ip6addr.cabal
@@ -1,5 +1,5 @@
 name:                ip6addr
-version:             2.0.0
+version:             2.0.0.1
 synopsis:            Commandline tool to deal with IPv6 address text representations
 description:         Commandline tool to validate, canonize and generate IPv6 address text representations
 license:             BSD3
@@ -7,13 +7,22 @@
 author:              Michel Boucey
 maintainer:          michel.boucey@gmail.com
 homepage:            https://github.com/MichelBoucey/ip6addr
-Copyright:           Copyright (c) 2011-2024 - Michel Boucey
-Category:            Network,Console
+Copyright:           Copyright (c) 2011-2025 - Michel Boucey
+Category:            Network, Cli
 build-type:          Simple
 cabal-version:       >=1.10
 extra-source-files:  README.md
  
-Tested-With: GHC ==8.8.4 || ==8.10.7 || ==9.0.2 || ==9.2.8 || ==9.4.8 || ==9.6.3 || ==9.8.2
+Tested-With:
+  GHC ==8.8.4
+   || ==8.10.7
+   || ==9.0.2
+   || ==9.2.8
+   || ==9.4.8
+   || ==9.6.7
+   || ==9.8.4
+   || ==9.10.2
+   || ==9.12.2
 
 Source-Repository head
   Type: git
@@ -27,8 +36,8 @@
                      , OverloadedStrings
   build-depends:       base                 >= 4.8 && < 5
                      , IPv6Addr             >= 2.0.0 && < 2.1
-                     , optparse-applicative >= 0.14 && < 0.19
+                     , optparse-applicative >= 0.14 && < 1
                      , text                 >=1.1 && < 2.2
   default-language:    Haskell2010
-  GHC-Options:         -Wall
+  GHC-Options:         -Wall -O2