diff --git a/README.md b/README.md
index 678b865..13dfd74 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,37 @@
-# quick-cook-haskell-project
 
-This repo is a tool which can quickly cook a haskell project for exploring. It is based on following tools:
-** nix
-** haskell.nix
-** summoner
+# Table of Contents
+
+1.  [Features](#org87edada)
+2.  [Usage](#orgc7dd06a)
+
+This is a tool which can help you generate a haskell project which uses the haskell.nix as the build framework.
+
+
+<a id="org87edada"></a>
+
+# Features
+
+This tool has following features at this moment:
+
+-   provision nix if needed
+-   generate haskell project with the summoner tool
+-   generate most usable nix files, including:
+    -   **default.nix:** this is the major nix file
+    -   **shell.nix:** to setup a development environment with nix-shell
+    -   **cross-build.nix:** this nix expression can be used to build cross platform targets, including fully static linked binary with musl library
+    -   **docker.nix:** this file can be used to build a docker image for the project
+
+
+<a id="orgc7dd06a"></a>
+
+# Usage
+
+Following these steps to use this tool:
+
+1.  clone the repository
+2.  run the following command under the clone directory:
+    
+    <p class="verse">
+    ./cook.sh <the porject directory> <the project name><br />
+    </p>
+
diff --git a/README.org b/README.org
new file mode 100644
index 0000000..fede544
--- /dev/null
+++ b/README.org
@@ -0,0 +1,27 @@
+#+TITLE: Readme
+#+AUTHOR: Hugh JF Chen
+#+DATE: 2020-12-18
+#+OPTIONS: ^:{} toc:3
+
+This is a tool which can help you generate a haskell project which uses the haskell.nix as the build framework.
+
+* Features
+
+This tool has following features at this moment:
+- provision nix if needed
+- generate haskell project with the summoner tool
+- generate most usable nix files, including:
+  - default.nix :: this is the major nix file
+  - shell.nix :: to setup a development environment with nix-shell
+  - cross-build.nix :: this nix expression can be used to build cross platform targets, including fully static linked binary with musl library
+  - docker.nix :: this file can be used to build a docker image for the project
+
+* Usage
+
+Following these steps to use this tool:
+
+1. clone the repository
+2. run the following command under the clone directory:
+   #+begin_verse
+./cook.sh <the porject directory> <the project name>
+   #+end_verse
diff --git a/build-framework/do.sh b/build-framework/do.sh
index b4b319b..24726cb 100755
--- a/build-framework/do.sh
+++ b/build-framework/do.sh
@@ -20,9 +20,10 @@ do
    rm -fr ${FILE_TO_SED}.bak.for.sed.inplace.edit
 done
 
+MY_INDEX_STATE=$(date +%Y-%m-%dT00:00:00Z)
 #update index-state in the cabal.project file
 echo "packages : ." > "$1/$2"/cabal.project
-echo "index-state : $(date +%Y-%m-%dT00:00:00Z)" >> "$1/$2"/cabal.project
+echo "index-state : ${MY_INDEX_STATE}" >> "$1/$2"/cabal.project
 # touch a cabal.project.local to make sure emacs dante use new-impure-nix build method
 touch "$1/$2"/cabal.project.local
 # also for emacs dante target
@@ -61,10 +62,12 @@ MY_CABAL_VER=$(nix-env -f "${MY_NIXPKGS_URL}" --quiet -qaP cabal-install -A hask
 MY_HLINT_VER=$(nix-env -f "${MY_NIXPKGS_URL}" --quiet -qaP hlint -A haskellPackages | sed -n '/hlint\ /p' | awk '{print $NF}' | awk -F"-" '{print $NF}') 
 sed -i.bak.for.replace.my_nixpkgs "s/MY_NIXPKGS/${MY_NIXPKGS}/g" "$1/$2/default.nix"
 sed -i.bak.for.replace.my_ghc_ver "s/MY_GHC_VER/${MY_GHC_VER}/g" "$1/$2/default.nix"
+sed -i.bak.for.replace.my_index_state "s/MY_INDEX_STATE/${MY_INDEX_STATE}/g" "$1/$2/default.nix"
 sed -i.bak.for.replace.my_cabal_ver "s/MY_CABAL_VER/${MY_CABAL_VER}/g" "$1/$2/shell.nix"
 sed -i.bak.for.replace.my_hlint_ver "s/MY_HLINT_VER/${MY_HLINT_VER}/g" "$1/$2/shell.nix"
 rm -fr "$1/$2"/default.nix.bak.for.replace.my_nixpkgs
 rm -fr "$1/$2"/default.nix.bak.for.replace.my_ghc_ver
+rm -fr "$1/$2"/default.nix.bak.for.replace.my_index_state
 rm -fr "$1/$2"/shell.nix.bak.for.replace.my_cabal_ver
 rm -fr "$1/$2"/shell.nix.bak.for.replace.my_hlint_ver
 
diff --git a/build-framework/template/default.nix b/build-framework/template/default.nix
index f9736d1..056411f 100644
--- a/build-framework/template/default.nix
+++ b/build-framework/template/default.nix
@@ -31,6 +31,7 @@ rec {
         name = "MY_PROJECT_NAME";
         src = ./.;
       };
+      index-state: "MY_INDEX_STATE";
       compiler-nix-name = haskellCompiler;
       # 'ghc' option is deprecated
       #ghc = pkgs.buildPackages.pkgs.haskell-nix.compiler.${haskellCompiler};