diff --git a/install b/install
index 2add000..14e9cc9 100755
--- a/install
+++ b/install
@@ -1,60 +1,50 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
-SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" >/dev/null 2>&1 &&
-  pwd)"
-PROFILES_DIR="${SCRIPT_DIR}/profiles"
-STOW_ARGS=(
-  "--no-folding"
-  "--adopt"
-  "--dir" "${PROFILES_DIR}"
-  "--target" "${HOME}"
+script_dir="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" >/dev/null 2>&1 &&
+    pwd)"
+readonly script_dir
+readonly profiles_dir="$script_dir/profiles"
+readonly -a stow_args=(
+    "--no-folding"
+    "--adopt"
+    "--dir" "$profiles_dir"
+    "--target" "$HOME"
 )
-SCRIPT_NAME="${0##*/}"
-
-readonly SCRIPT_DIR
-readonly PROFILES_DIR
-readonly -a STOW_ARGS
-readonly SCRIPT_NAME
-
-print_opt() {
-  local -r option="$1"
-  local -r description="$2"
-  printf "  %-22s %s\n" "${option}" "${description}"
-}
+readonly script_name="${0##*/}"
 
 shell_quote() {
-  local -r string="$1"
-  printf "'%s'" "${string//'/'\\''/}"
+    local -r string="$1"
+    printf "'%s'" "${string//'/'\\''/}"
 }
 
 array_contains() {
-  local -r target_item="$1"
-  shift
-  local -a -r array=("$@")
-  local item
-  for item in "${array[@]}"; do
-    if [[ ${item} == "${target_item}" ]]; then
-      return 0
-    fi
-  done
-  return 1
+    local -r target_item="$1"
+    shift
+    local -a -r array=("$@")
+    local item
+    for item in "${array[@]}"; do
+        if [[ ${item} == "$target_item" ]]; then
+            return 0
+        fi
+    done
+    return 1
 }
 
 die() {
-  local -r message="$1"
-  printf "%s: %b\n" "${SCRIPT_NAME}" "${message}" >&2
-  exit 1
+    local -r message="$1"
+    printf "%s: %b\n" "$script_name" "$message" >&2
+    exit 1
 }
 
 invalid_option() {
-  local -r option="$1"
-  die "invalid option $(shell_quote "${option}")
-Try '${SCRIPT_NAME} --help' for usage."
+    local -r option="$1"
+    die "invalid option $(shell_quote "$option")
+Try '$script_name --help' for usage."
 }
 
 check_deps() {
-  if ! command -v stow >/dev/null 2>&1; then
-    cat >&2 <<EOF
+    if ! command -v stow >/dev/null 2>&1; then
+        cat >&2 <<EOF
 Error: 'stow' not found in PATH.
 
 GNU Stow is a symlink farm manager used to deploy dotfiles/packages
@@ -71,14 +61,14 @@ source if GNU Stow is not packaged or your system requires it.
 
 Project: https://www.gnu.org/software/stow/
 EOF
-    exit 1
-  fi
+        exit 1
+    fi
 }
 
 require_profiles_dir() {
-  if [[ ! -d "${PROFILES_DIR}" ]]; then
-    cat >&2 <<EOF
-Error: profiles directory not found: ${PROFILES_DIR}
+    if [[ ! -d "$profiles_dir" ]]; then
+        cat >&2 <<EOF
+Error: profiles directory not found: $profiles_dir
 
 This directory must contain profile subdirectories with dotfiles.
 
@@ -87,98 +77,93 @@ Make sure you:
   - create the directory, or
   - clone the dotfiles repository correctly.
 
-More information about what is profile can be found using '${SCRIPT_NAME} --help profile'.
+More information about what is profile can be found using '$script_name --help profile'.
 EOF
-    exit 1
-  fi
-  mapfile -t PROFILES < <(find "${PROFILES_DIR}" -mindepth 1 -maxdepth 1 \
-    -type d -printf '%f\n')
-  readonly PROFILES
+        exit 1
+    fi
+    mapfile -t PROFILES < <(find "$profiles_dir" -mindepth 1 -maxdepth 1 \
+        -type d -printf '%f\n')
+    readonly PROFILES
 }
 
 parse_args() {
-  while (($# > 0)); do
-    case $1 in
-    -h)
-      show_general_help
-      exit 0
-      ;;
-    --help)
-      if (($# >= 2)) && [[ $2 ]] && [[ $2 != -* ]]; then
-        show_help_topic "$2"
-      else
-        show_general_help
-      fi
-      exit 0
-      ;;
-    --help=*)
-      local -r topic="${1#*=}"
-      [[ -z ${topic} ]] && show_general_help && exit 0
-      show_help_topic "${topic}"
-      exit 0
-      ;;
-    -l | --list-profiles)
-      list_profiles="true"
-      shift
-      ;;
-    -P | --prune-symlinks)
-      prune_symlinks="true"
-      shift
-      ;;
-    -v | --verbose)
-      verbose="true"
-      shift
-      ;;
-    -p | --profile)
-      ( (($# < 2)) || [[ -z "$2" ]]) && die "--profile requires an argument"
-      profile="$2"
-      shift 2
-      ;;
-    *) invalid_option "$1" ;;
-    esac
-  done
+    while (($# > 0)); do
+        case $1 in
+        -h)
+            show_general_help
+            exit 0
+            ;;
+        --help)
+            if (($# >= 2)) && [[ $2 ]] && [[ $2 != -* ]]; then
+                show_help_topic "$2"
+            else
+                show_general_help
+            fi
+            exit 0
+            ;;
+        --help=*)
+            local -r topic="${1#*=}"
+            [[ -z $topic ]] && show_general_help && exit 0
+            show_help_topic "$topic"
+            exit 0
+            ;;
+        -l | --list-profiles)
+            list_profiles="true"
+            shift
+            ;;
+        -v | --verbose)
+            verbose="true"
+            shift
+            ;;
+        -p | --profile)
+            ( (($# < 2)) || [[ -z "$2" ]]) &&
+                die "--profile requires an argument"
+            profile="$2"
+            shift 2
+            ;;
+        *) invalid_option "$1" ;;
+        esac
+    done
 }
 
 validate_args() {
-  if [[ -n "${list_profiles}" ]] &&
-    [[ -n "${prune_symlinks}" || -n "${verbose}" || -n "${profile}" ]]; then
-    die "options '--list-profiles' and others cannot be used together"
-  fi
+    if [[ -n "$list_profiles" ]] &&
+        [[ -n "$verbose" || -n "$profile" ]]; then
+        die "options '--list-profiles' and others cannot be used together"
+    fi
 
-  if [[ -n "${profile}" ]] &&
-    ! array_contains "${profile}" "${PROFILES[@]}"; then
-    die "profile $(shell_quote "${profile}") cannot be found"
-  fi
+    if [[ -n "$profile" ]] &&
+        ! array_contains "$profile" "${PROFILES[@]}"; then
+        die "profile $(shell_quote "$profile") cannot be found"
+    fi
 }
 
 show_general_help() {
-  echo "Usage: ${SCRIPT_NAME} [options]"
-  echo "       ${SCRIPT_NAME} -l | --list-profiles"
-  echo "       ${SCRIPT_NAME} --help[=TOPIC]"
-  echo
-  echo "Options:"
-  print_opt "-h, --help[=TOPIC]" \
-    "show general help or help for a specific topic"
-  print_opt "-p, --profile PROFILE" "select profile"
-  print_opt "-v, --verbose" "increase verbosity"
-  print_opt "-P, --prune-symlinks" \
-    "remove dangling symlinks in home directory"
-  print_opt "-l, --list-profiles" \
-    "list available profiles (cannot be combined with other options)"
-  echo
-  echo "Topics:"
-  print_opt "profile" "explanation of profile structure and usage"
-  echo
-  echo "Profile:"
-  echo "  Directory containing dotfiles plus optional parent and hooks/."
-  echo "  Used by the installer to group and deploy related configurations."
+    cat <<EOF
+Usage: $script_name [options]
+       $script_name -l | --list-profiles
+       $script_name --help[=TOPIC]
+
+Options:
+  -h, --help[=TOPIC]     show general help or help for a specific topic
+  -p, --profile PROFILE  select profile
+  -v, --verbose          increase verbosity
+  -l, --list-profiles    list available profiles (cannot be combined with other options)
+
+Topics:
+  profile                explanation of profile structure and usage
+
+Profile:
+  Directory containing dotfiles plus optional parent and hooks/.
+  Used by the installer to group and deploy related configurations.
+EOF
 }
 
 show_help_topic() {
-  local topic="$1"
-  case "${topic}" in
-  profile)
-    cat <<EOF
+    local topic="$1"
+    case "$topic" in
+    profile)
+        cat <<EOF
 A profile is a directory under 'profiles/' that groups dotfiles to be
 installed together using GNU Stow.
 
@@ -196,97 +181,97 @@ tree automatically and installs profiles in the correct order.
 Use .stow-local-ignore to prevent linking internal files such as hooks/
 and parent.
 EOF
-    ;;
-  *) die "unknown help topic: ${topic}" ;;
-  esac
+        ;;
+    *) die "unknown help topic: $topic" ;;
+    esac
 }
 
 run_pre_hooks() {
-  local -r target_profile="$1"
-  for hook in "${PROFILES_DIR}/${target_profile}"/hooks/pre/*; do
-    if [[ -f "${hook}" && -x "${hook}" ]]; then
-      echo "Running pre-install hook ${hook##*/}"
-      "${hook}"
-    fi
-  done
+    local -r target_profile="$1"
+    for hook in "$profiles_dir/$target_profile"/hooks/pre/*; do
+        if [[ -f "$hook" && -x "$hook" ]]; then
+            echo "Running pre-install hook ${hook##*/}"
+            "$hook"
+        fi
+    done
 }
 
 run_post_hooks() {
-  local -r target_profile="$1"
-  for hook in "${PROFILES_DIR}/${target_profile}"/hooks/post/*; do
-    if [[ -f "${hook}" && -x "${hook}" ]]; then
-      echo "Running post-install hook ${hook##*/}"
-      "${hook}"
-    fi
-  done
+    local -r target_profile="$1"
+    for hook in "$profiles_dir/$target_profile"/hooks/post/*; do
+        if [[ -f "$hook" && -x "$hook" ]]; then
+            echo "Running post-install hook ${hook##*/}"
+            "$hook"
+        fi
+    done
 }
 
 prune_symlinks() {
-  echo -n "Removing dangling symlinks in home directory... "
+    echo -n "Removing dangling symlinks in home directory... "
 
-  pushd "${HOME}" >/dev/null || exit 1
-  local common_files
-  local -r target_profile="$1"
-  mapfile -t common_files < <(comm -12 <(find "${HOME}" -type l \
-    -printf '%P\n' 2>/dev/null | sort) \
-    <(find "${PROFILES_DIR}/${target_profile}" -type f -printf '%P\n' | sort))
-  local target_file
-  for target_file in "${common_files[@]}"; do
-    local -a rm_args=("--force")
-    [[ ${verbose} ]] && rm_args+=("--verbose")
-    rm "${rm_args[@]}" -- "${target_file}"
-  done
-  popd >/dev/null || exit 1
+    pushd "${HOME}" >/dev/null || exit 1
+    local common_files
+    local -r target_profile="$1"
+    mapfile -t common_files < <(comm -12 <(find "${HOME}" -type l \
+        -printf '%P\n' 2>/dev/null | sort) \
+        <(find "$profiles_dir/$target_profile" -type f -printf '%P\n' | sort))
+    local target_file
+    for target_file in "${common_files[@]}"; do
+        local -a rm_args=("--force")
+        [[ ${verbose} ]] && rm_args+=("--verbose")
+        rm "${rm_args[@]}" -- "$target_file"
+    done
+    popd >/dev/null || exit 1
 
-  echo "OK"
+    echo "OK"
 }
 
 stow_profile() {
-  local -r target_profile="$1"
-  if stow "${STOW_ARGS[@]}" "${target_profile}" 2>&1; then
-    echo "Profile ${target_profile} has been stowed"
-  else
-    echo "Failed to create symlinks pointing to dotfiles" \
-      "in profile ${target_profile}"
-  fi
+    local -r target_profile="$1"
+    if stow "${stow_args[@]}" "$target_profile" 2>&1; then
+        echo "Profile $target_profile has been stowed"
+    else
+        echo "Failed to create symlinks pointing to dotfiles" \
+            "in profile $target_profile"
+    fi
 }
 
 fetch_parents() {
-  local -r target_profile="$1"
-  if [[ -s "${PROFILES_DIR}/${target_profile}/parent" ]]; then
-    local parent
-    parent="$(cat "${PROFILES_DIR}/${target_profile}/parent")"
-    if [[ -s "${PROFILES_DIR}/${parent}/parent" ]]; then
-      fetch_parents "${parent}"
+    local -r target_profile="$1"
+    if [[ -s "$profiles_dir/$target_profile/parent" ]]; then
+        local parent
+        parent="$(cat "$profiles_dir/$target_profile/parent")"
+        if [[ -s "$profiles_dir/$parent/parent" ]]; then
+            fetch_parents "$parent"
+        fi
+        echo "$parent"
     fi
-    echo "${parent}"
-  fi
 }
 
 build_deptree() {
-  local -r target_profile="$1"
-  fetch_parents "${target_profile}"
-  echo "${target_profile}"
+    local -r target_profile="$1"
+    fetch_parents "$target_profile"
+    echo "$target_profile"
 }
 
 install_dotfiles() {
-  local target_profile
-  for target_profile in $(build_deptree "${profile}"); do
-    run_pre_hooks "${target_profile}"
-    [[ -n "${prune_symlinks}" ]] && prune_symlinks "${target_profile}"
-    stow_profile "${target_profile}"
-    run_post_hooks "${target_profile}"
-  done
+    local target_profile
+    for target_profile in $(build_deptree "$profile"); do
+        run_pre_hooks "${target_profile}"
+        prune_symlinks "${target_profile}"
+        stow_profile "${target_profile}"
+        run_post_hooks "${target_profile}"
+    done
 }
 
 main() {
-  check_deps
-  parse_args "$@"
-  require_profiles_dir
-  (($# == 0)) && show_general_help && exit 1
-  validate_args
-  [[ -n "${list_profiles}" ]] && echo "${PROFILES[@]}" && exit 0
-  install_dotfiles
+    check_deps
+    parse_args "$@"
+    require_profiles_dir
+    (($# == 0)) && show_general_help && exit 1
+    validate_args
+    [[ -n "$list_profiles" ]] && echo "${PROFILES[@]}" && exit 0
+    install_dotfiles
 }
 
 main "$@"