diff --git a/Cargo.toml b/Cargo.toml
index 9ebe0f0..f7dfc38 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -132,10 +132,10 @@ assets = [
     { source = "target/man/fr/chsr.8.gz", dest = "/usr/share/man/fr/man8/chsr.8.gz", user = "root", group = "root", mode = "0644", doc = true }
 ]
 post_install_script = "resources/rh/postinst.sh"
-post_install_script_prog = [ "/bin/sh", "-c" ]
+post_install_script_flags = 0b101
 
 pre_uninstall_script = "resources/rh/prerm.sh"
-pre_uninstall_script_prog = [ "/bin/sh", "-c" ]
+pre_uninstall_script_flags = 0b101
 
 [package.metadata.generate-rpm.requires]
 pam = "*"
diff --git a/README.md b/README.md
index a1d97d2..dbe1935 100644
--- a/README.md
+++ b/README.md
@@ -37,20 +37,44 @@
 
 ## Installation
 
-### Prerequisites
+### Prerequisites (for compilation)
 
 * [Rust](https://www.rust-lang.org/tools/install) >= 1.76.0
   * You can install Rust by running the following command:
     ```sh
     curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
     ```
-* [git](https://git-scm.com/book/en/v2/Getting-Started-Installing-Git)  
+    (Do not forget to add the cargo bin directory to your PATH with `. "$HOME/.cargo/env"` command)
+* [git](https://git-scm.com/book/en/v2/Getting-Started-Installing-Git)
+  * You can install git by running the following commands depending on your distribution:
+    Ubuntu : `sudo apt-get install git`, RedHat : `sudo yum install git`, ArchLinux : `sudo pacman -S git`
+* [clang](https://clang.llvm.org/get_started.html) (or gcc, but clang is highly recommended)
+  * You can install clang by running the following commands depending on your distribution:
+    Ubuntu : `sudo apt-get install clang`, RedHat : `sudo yum install clang`, ArchLinux : `sudo pacman -S clang`
 
-### How to install sr and chsr
+Then the xtask installation will install the rest of the dependencies for you.
 
-  1. `git clone <https://github.com/LeChatP/RootAsRole>`
+### Install from source
+
+  1. `git clone https://github.com/LeChatP/RootAsRole`
   1. `cd RootAsRole`
-  1. `sudo cargo xtask install -i -b`
+  1. `cargo xtask install -bip sudo`
+
+
+### Install from precompiled binaries
+
+You can download the precompiled binaries from the [release page](https://github.com/LeChatP/RootAsRole/releases).
+
+Then you can install the package with the following commands:
+
+```sh
+sudo apt install rootasrole_3.0.0_amd64.deb
+```
+
+```sh
+sudo rpm -i rootasrole-3.0.0-1.x86_64.rpm
+```
+
 
 ### Additional Installation Options
 
@@ -159,16 +183,14 @@ This doesn't mean that earlier versions of these distributions are incompatible;
 
 ## Contributors
 
-Ahmad Samer Wazan : <ahmad-samer.wazan@irit.fr>
+Eddie Billoir : <eddie.billoir@gmail.com>
+
+Ahmad Samer Wazan : <ahmad.wazan@zu.ac.ae>
 
 Rémi Venant: <remi.venant@gmail.com>
 
 Guillaume Daumas : <guillaume.daumas@univ-tlse3.fr>
 
-Eddie Billoir : <eddie.billoir@gmail.com>
-
-Anderson Hemlee : <anderson.hemlee@protonmail.com>
-
 Romain Laborde : <laborde@irit.fr>
 
 ## About Logo
diff --git a/resources/rh/postinst.sh b/resources/rh/postinst.sh
index 93e6de3..e98c427 100644
--- a/resources/rh/postinst.sh
+++ b/resources/rh/postinst.sh
@@ -1,17 +1,24 @@
 #!/bin/sh
+if [ -z ${SUDO_USER+x} ]; then INSTALL_USER=$(id -urn); else INSTALL_USER=$SUDO_USER; fi
+
 filesystem() {
     df -T "$1" | awk 'NR==2 {print $2}'
 }
 
 configure() {
-    sed -i "s/ROOTADMINISTRATOR/$(id -urn)/g" /etc/security/rootasrole.json
+    echo "Configuring rootasrole.json"
+	sed -i "s/ROOTADMINISTRATOR/$INSTALL_USER/g" /etc/security/rootasrole.json
     FS=$(filesystem /etc/security/rootasrole.json)
     case $FS in
     "ext2" | "ext3" | "ext4" | "xfs" | "btrfs" | "ocfs2" | "jfs" | "reiserfs")
+        echo "Setting immutable attribute on /etc/security/rootasrole.json"
         chattr +i /etc/security/rootasrole.json
         ;;
     *)
-        sed -i "s/\"CAP_LINUX_IMMUTABLE\"//g" /etc/security/rootasrole.json
+        echo "filesystem $FS does not support immutable attribute"
+        echo "Removing immutable parameter from /etc/security/rootasrole.json"
+		sed -i "s/\"immutable\": true/\"immutable\": false/g" /etc/security/rootasrole.json
+		sed -i "s;\"CAP_LINUX_IMMUTABLE\";;g" /etc/security/rootasrole.json
         ;;
     esac
 }
diff --git a/resources/rh/prerm.sh b/resources/rh/prerm.sh
index 368fb33..c0a05ad 100644
--- a/resources/rh/prerm.sh
+++ b/resources/rh/prerm.sh
@@ -1,3 +1 @@
-#!/bin/sh
-
-chattr -i /etc/security/rootasrole.json || true
\ No newline at end of file
+chattr -i /etc/security/rootasrole.json 2>/dev/null || true
\ No newline at end of file