diff --git a/install.sh b/install.sh
index 2e96783..84143e3 100644
--- a/install.sh
+++ b/install.sh
@@ -2,7 +2,7 @@
 set -euo pipefail
 
 # Rootless-DevBox Installer
-# 
+#
 # This script automates the installation of DevBox in a rootless environment
 # using nix-user-chroot without requiring root privileges.
 #
@@ -45,7 +45,7 @@ print_error() {
 check_user_namespace_support() {
   print_step "Checking system compatibility"
   echo "Verifying if your system supports unprivileged user namespaces (required for nix-user-chroot)..."
-  
+
   if ! unshare --user --pid echo "YES" &>/dev/null; then
     print_error "Your system does not support unprivileged user namespaces, which is required for nix-user-chroot to work.
 
@@ -62,8 +62,9 @@ For more information, see: https://github.com/nix-community/nix-user-chroot"
 
 # Detect system architecture
 get_architecture() {
-  local arch=$(uname -m)
-  
+  local arch
+  arch=$(uname -m)
+
   case "$arch" in
     x86_64)
       echo "x86_64-unknown-linux-musl"
@@ -87,7 +88,7 @@ get_architecture() {
 download_file() {
   local url="$1"
   local output_file="$2"
-  
+
   if command -v curl &>/dev/null; then
     curl -fsSL "$url" -o "$output_file" || return 1
   elif command -v wget &>/dev/null; then
@@ -130,8 +131,10 @@ main() {
   local nix_user_chroot_path="${local_bin_dir}/nix-user-chroot"
   local nix_dir="${HOME}/.nix"
   local nix_user_chroot_version="1.2.2"
-  local arch=$(get_architecture)
-  local temp_dir=$(create_temp_dir)
+  local arch
+  local temp_dir
+  arch=$(get_architecture)
+  temp_dir=$(create_temp_dir)
 
   if [ -x "$devbox_path" ] && [ -x "$nix_chroot_path" ] && [ -x "$nix_user_chroot_path" ]; then
     echo_color "$GREEN" "All components are already installed!"
@@ -203,10 +206,10 @@ EOF
 
   # Step 6: Continue with DevBox installation process
   print_step "Preparing DevBox installation"
-  
+
   local devbox_install_script="${temp_dir}/devbox_install_user.sh"
-  local permanent_devbox_install_script="${HOME}/devbox_install_user.sh" 
-  
+  local permanent_devbox_install_script="${HOME}/devbox_install_user.sh"
+
   cat > "$devbox_install_script" <<'EOF'
 #!/bin/bash
 #
@@ -425,16 +428,16 @@ main() {
 
 main "$@"
 EOF
-  
+
   chmod +x "$devbox_install_script"
   cp "$devbox_install_script" "$permanent_devbox_install_script"
   chmod +x "$permanent_devbox_install_script"
   print_success "Created DevBox installation script: ${devbox_install_script}"
   print_success "Created permanent backup at: ${permanent_devbox_install_script}"
-  
+
   # Step 7: Set Nix mirror if needed
   set_nix_mirror_if_needed
-  
+
   echo ""
   echo_color "$BOLD" "Next: Activate Nix Environment and Install DevBox"
   echo_color "$BOLD" "⚠️  IMPORTANT: Installation requires TWO steps! ⚠️"
@@ -445,16 +448,16 @@ EOF
   echo ""
   echo "Would you like this script to attempt to run '${local_bin_dir}/nix-chroot' for you now? [Y/n]"
   echo_color "$GREY" "(If you choose yes, after nix-chroot starts, you MUST MANUALLY run the second command shown above)"
-  
+
   if [ -t 0 ]; then
     read -r response
   else
     response="y"
     echo "Non-interactive mode detected. Defaulting to 'y'."
   fi
-  
+
   response=${response:-y}
-  
+
   if [[ "$response" =~ ^[Yy] ]]; then
     echo ""
     echo_color "$CYAN" "Attempting to start ${local_bin_dir}/nix-chroot..."
@@ -467,16 +470,19 @@ EOF
     if [ ! -x "${local_bin_dir}/nix-chroot" ]; then
         print_error "${local_bin_dir}/nix-chroot not found or not executable. Please check previous steps."
     fi
-    
+
+    # shellcheck disable=2016
     if ! grep -qF 'export PATH="$HOME/.local/bin:$PATH" # Added by Rootless-DevBox' ~/.bashrc; then
-      echo '' >> ~/.bashrc
-      echo '# Added by Rootless-DevBox installer' >> ~/.bashrc
-      echo 'export PATH="$HOME/.local/bin:$PATH" # Added by Rootless-DevBox' >> ~/.bashrc
+      cat >> "${HOME}/.bashrc" <<EOF
+
+# Added by Rootless-DevBox installer
+export PATH="\$HOME/.local/bin:\$PATH" # Added by Rootless-DevBox
+EOF
       echo "Added ~/.local/bin to PATH in ~/.bashrc"
     fi
-    
+
     if ! grep -qF '# Rootless-DevBox nix-chroot environment indicator' ~/.bashrc; then
-      echo '' >> ~/.bashrc 
+      echo '' >> ~/.bashrc
       cat >> ~/.bashrc <<EOF
 # Rootless-DevBox nix-chroot environment indicator
 if [ "\$NIX_CHROOT" = "1" ]; then
@@ -485,7 +491,7 @@ fi
 EOF
       echo "Added nix-chroot environment indicator to ~/.bashrc"
     fi
-    
+
     echo_color "$YELLOW" "Environment variables configured. Now installing DevBox automatically in nix-chroot environment..."
     "${local_bin_dir}/nix-user-chroot" "${nix_dir}" env NIX_CHROOT=1 bash "${permanent_devbox_install_script}"
     if [ -x "${local_bin_dir}/devbox" ]; then
@@ -510,20 +516,24 @@ EOF
     read -r configure_bashrc
     if [[ "$configure_bashrc" =~ ^[Yy] ]]; then
       print_step "Configuring environment variables in ~/.bashrc"
-      
+
       local bashrc_modified_count=0
+      # shellcheck disable=2016
       if ! grep -qF 'export PATH="$HOME/.local/bin:$PATH" # Added by Rootless-DevBox' ~/.bashrc; then
-        echo '' >> ~/.bashrc
-        echo '# Added by Rootless-DevBox installer' >> ~/.bashrc
-        echo 'export PATH="$HOME/.local/bin:$PATH" # Added by Rootless-DevBox' >> ~/.bashrc
+      cat >> "${HOME}/.bashrc" <<EOF
+
+# Added by Rootless-DevBox installer
+export PATH="\$HOME/.local/bin:\$PATH" # Added by Rootless-DevBox
+EOF
         echo "Added ~/.local/bin to PATH in ~/.bashrc"
         ((bashrc_modified_count++))
       else
+        # shellcheck disable=SC2088
         echo "~/.local/bin PATH entry by Rootless-DevBox already in ~/.bashrc."
       fi
-      
+
       if ! grep -qF '# Rootless-DevBox nix-chroot environment indicator' ~/.bashrc; then
-        echo '' >> ~/.bashrc 
+        echo '' >> ~/.bashrc
         cat >> ~/.bashrc <<EOF
 # Rootless-DevBox nix-chroot environment indicator
 if [ "\$NIX_CHROOT" = "1" ]; then
@@ -533,13 +543,15 @@ EOF
         echo "Added nix-chroot environment indicator to ~/.bashrc"
         ((bashrc_modified_count++))
       else
+        # shellcheck disable=SC2088
         echo "nix-chroot environment indicator already in ~/.bashrc."
       fi
-      
+
       if [ "$bashrc_modified_count" -gt 0 ]; then
         print_success "Configuration changes applied to ~/.bashrc."
         echo "Please run 'source ~/.bashrc' or open a new terminal for these changes to take full effect."
       else
+        # shellcheck disable=SC2088
         print_success "~/.bashrc already contains the necessary configurations or no changes were made."
       fi
       echo ""
@@ -555,7 +567,7 @@ EOF
       echo "to your ~/.bashrc (or equivalent shell configuration file)."
     fi
   fi
-  
+
   echo ""
   echo_color "$YELLOW" "⚠️  Verify Installation ⚠️"
   echo "After installation, please confirm the following files exist:"
@@ -565,7 +577,7 @@ EOF
   echo ""
   echo "If devbox doesn't exist, please enter the nix-chroot environment and run:"
   echo_color "$CYAN" "${permanent_devbox_install_script}"
-  
+
   echo ""
   echo "If you encounter any issues, please report them at: https://github.com/nebstudio/Rootless-DevBox/issues"
   echo "If this script was helpful, please consider giving a Star on GitHub! ⭐"
diff --git a/uninstall.sh b/uninstall.sh
index fff42c4..f0b863e 100644
--- a/uninstall.sh
+++ b/uninstall.sh
@@ -13,7 +13,7 @@ BLUE="\033[0;34m"
 YELLOW="\033[0;33m"
 RED="\033[0;31m"
 RESET="\033[0m"
-GREY="\033[90m"
+# GREY="\033[90m"
 CYAN="\033[0;36m"
 
 # Echo with color
@@ -80,6 +80,7 @@ main() {
   local nix_user_chroot_path="${local_bin_dir}/nix-user-chroot"
 
   # Check if any component is installed
+  # shellcheck disable=2016
   if [ ! -f "$devbox_path" ] && \
      [ ! -f "$nix_chroot_path" ] && \
      [ ! -f "$nix_user_chroot_path" ] && \
@@ -110,8 +111,10 @@ main() {
   if [ ! -f "$bashrc_file" ]; then
     print_warning "${bashrc_file} not found. Skipping .bashrc modifications."
   else
+    # shellcheck disable=SC2016
     if grep -qE '(# Added by Rootless-DevBox installer|export PATH="\$HOME/\.local/bin:\$PATH" # Added by Rootless-DevBox|# Rootless-DevBox nix-chroot environment indicator)' "$bashrc_file"; then
-      local bashrc_backup="${HOME}/.bashrc.devbox_uninstall_$(date +%Y%m%d%H%M%S).bak"
+      local bashrc_backup
+      bashrc_backup="${HOME}/.bashrc.devbox_uninstall_$(date +%Y%m%d%H%M%S).bak"
       echo "Modifying ${bashrc_file} to remove Rootless-DevBox configurations."
       echo "Backing up current ${bashrc_file} to ${bashrc_backup}"
       if cp "${bashrc_file}" "${bashrc_backup}"; then
@@ -205,4 +208,4 @@ main() {
 
 # Run the main function
 main "$@"
-exit 0
\ No newline at end of file
+exit 0