diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1dcdf9e..0a3b93c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -33,4 +33,4 @@ jobs:
             - uses: actions/checkout@v4
             - name: Analyze
               shell: bash
-              run: ./ci/analyze --analyzer shellcheck
+              run: ./ci/analyze.sh --analyzer shellcheck
diff --git a/README.md b/README.md
index 4e516ce..b7717a6 100644
--- a/README.md
+++ b/README.md
@@ -18,11 +18,11 @@ git clone git@github.com:apcountryman/build-avr-gcc.git
 
 ## Usage
 
-See the `build-avr-gcc` and `install-device-family-pack` scripts' help text for usage
-details.
+See the `build-avr-gcc.sh` and `install-device-family-pack.sh` scripts' help text for
+usage details.
 ```shell
-./build-avr-gcc --help
-./install-device-family-packs --help
+./build-avr-gcc.sh --help
+./install-device-family-packs.sh --help
 ```
 
 ## Versioning
@@ -37,11 +37,11 @@ workflow.
 
 ## Git Hooks
 
-To install this repository's Git hooks, run the `install` script located in the
+To install this repository's Git hooks, run the `install.sh` script located in the
 `git/hooks` directory.
-See the `install` script's help text for usage details.
+See the `install.sh` script's help text for usage details.
 ```shell
-$ ./git/hooks/install --help
+$ ./git/hooks/install.sh --help
 ```
 
 ## Code of Conduct
diff --git a/build-avr-gcc b/build-avr-gcc.sh
similarity index 84%
rename from build-avr-gcc
rename to build-avr-gcc.sh
index dcf57f6..967f8c6 100755
--- a/build-avr-gcc
+++ b/build-avr-gcc.sh
@@ -35,40 +35,49 @@ function abort()
     exit 1
 }
 
+function validate_script()
+{
+    if ! shellcheck "$script"; then
+        abort
+    fi
+}
+
 function display_help_text()
 {
-    echo "NAME"
-    echo "    $mnemonic - Build avr-gcc."
-    echo "SYNOPSIS"
-    echo "    $mnemonic --help"
-    echo "    $mnemonic --version"
-    echo "    $mnemonic --avr-gcc-version <avr-gcc-version>"
-    echo "        --install-prefix <install-prefix> [--jobs <jobs>]"
-    echo "OPTIONS"
-    echo "    --avr-gcc-version <avr-gcc-version>"
-    echo "        Specify the version of avr-gcc to build. The following avr-gcc versions"
-    echo "        are supported:"
-    echo "            8.3.0"
-    echo "            9.3.0"
-    echo "    --help"
-    echo "        Display this help text."
-    echo "    --install-prefix <install-prefix>"
-    echo "        Specify the install prefix. '<install-prefix>/bin' must be in '\$PATH'"
-    echo "        prior to the execution of this script."
-    echo "    --jobs <jobs>"
-    echo "        Specify the number of build jobs to use when building. If the number of"
-    echo "        jobs is not specified, 'nproc - 1' jobs will be used."
-    echo "    --version"
-    echo "        Display the version of this script."
-    echo "EXAMPLES"
-    echo "    $mnemonic --help"
-    echo "    $mnemonic --version"
-    echo "    $mnemonic --avr-gcc-version 8.3.0 --install-prefix ~/bin/avr-gcc/8.3.0"
-    echo "    $mnemonic --avr-gcc-version 8.3.0 --install-prefix ~/bin/avr-gcc/8.3.0"
-    echo "        --jobs 1"
-    echo "    $mnemonic --avr-gcc-version 9.3.0 --install-prefix ~/bin/avr-gcc/9.3.0"
-    echo "    $mnemonic --avr-gcc-version 9.3.0 --install-prefix ~/bin/avr-gcc/9.3.0"
-    echo "        --jobs 1"
+    printf "%b" \
+        "NAME\n" \
+        "    $mnemonic - Build avr-gcc.\n" \
+        "SYNOPSIS\n" \
+        "    $mnemonic --help\n" \
+        "    $mnemonic --version\n" \
+        "    $mnemonic --avr-gcc-version <avr-gcc-version>\n" \
+        "        --install-prefix <install-prefix> [--jobs <jobs>]\n" \
+        "OPTIONS\n" \
+        "    --avr-gcc-version <avr-gcc-version>\n" \
+        "        Specify the version of avr-gcc to build. The following avr-gcc versions\n" \
+        "        are supported:\n" \
+        "            8.3.0\n" \
+        "            9.3.0\n" \
+        "    --help\n" \
+        "        Display this help text.\n" \
+        "    --install-prefix <install-prefix>\n" \
+        "        Specify the install prefix. '<install-prefix>/bin' must be in '\$PATH'\n" \
+        "        prior to the execution of this script.\n" \
+        "    --jobs <jobs>\n" \
+        "        Specify the number of build jobs to use when building. If the number of\n" \
+        "        jobs is not specified, 'nproc - 1' jobs will be used.\n" \
+        "    --version\n" \
+        "        Display the version of this script.\n" \
+        "EXAMPLES\n" \
+        "    $mnemonic --help\n" \
+        "    $mnemonic --version\n" \
+        "    $mnemonic --avr-gcc-version 8.3.0 --install-prefix ~/bin/avr-gcc/8.3.0\n" \
+        "    $mnemonic --avr-gcc-version 8.3.0 --install-prefix ~/bin/avr-gcc/8.3.0\n" \
+        "        --jobs 1\n" \
+        "    $mnemonic --avr-gcc-version 9.3.0 --install-prefix ~/bin/avr-gcc/9.3.0\n" \
+        "    $mnemonic --avr-gcc-version 9.3.0 --install-prefix ~/bin/avr-gcc/9.3.0\n" \
+        "        --jobs 1\n" \
+        ""
 }
 
 function display_version()
@@ -295,6 +304,7 @@ function build_avr_gcc()
         "avr-libc"
     )
 
+    local component
     for component in "${components[@]}"; do
         local component_build_directory="$build_directory/$component/build"
 
@@ -312,6 +322,9 @@ function main()
 {
     local -r script=$( readlink -f "$0" )
     local -r mnemonic=$( basename "$script" )
+
+    validate_script
+
     local -r repository=$( dirname "$script" )
     local -r version=$( git -C "$repository" describe --match=none --always --dirty --broken )
 
diff --git a/ci/analyze b/ci/analyze.sh
similarity index 62%
rename from ci/analyze
rename to ci/analyze.sh
index 58a5c9e..a256964 100755
--- a/ci/analyze
+++ b/ci/analyze.sh
@@ -35,27 +35,50 @@ function abort()
     exit 1
 }
 
+function validate_script()
+{
+    if ! shellcheck "$script"; then
+        abort
+    fi
+}
+
 function display_help_text()
 {
-    echo "NAME"
-    echo "    $mnemonic - Run a static analyzer against build-avr-gcc."
-    echo "SYNOPSIS"
-    echo "    $mnemonic --help"
-    echo "    $mnemonic --version"
-    echo "    $mnemonic --analyzer <analyzer>"
-    echo "OPTIONS"
-    echo "    --analyzer <analyzer>"
-    echo "        Specify the analyzer to run against the build-avr-gcc repository. The"
-    echo "        following analyzers are supported:"
-    echo "            shellcheck"
-    echo "    --help"
-    echo "        Display this help text."
-    echo "    --version"
-    echo "        Display the version of this script."
-    echo "EXAMPLES"
-    echo "    $mnemonic --help"
-    echo "    $mnemonic --version"
-    echo "    $mnemonic --analyzer shellcheck"
+    local analyzer
+
+    printf "%b" \
+        "NAME\n" \
+        "    $mnemonic - Ensure no static analysis errors are present.\n" \
+        "SYNOPSIS\n" \
+        "    $mnemonic --help\n" \
+        "    $mnemonic --version\n" \
+        "    $mnemonic --analyzer <analyzer>\n" \
+        "OPTIONS\n" \
+        "    --analyzer <analyzer>\n" \
+        "        Specify the analyzer to run. The following analyzers are supported:\n" \
+        ""
+
+    for analyzer in "${analyzers[@]}"; do
+        printf "%b" \
+            "            $analyzer\n" \
+            ""
+    done
+
+    printf "%b" \
+        "    --help\n" \
+        "        Display this help text.\n" \
+        "    --version\n" \
+        "        Display the version of this script.\n" \
+        "EXAMPLES\n" \
+        "    $mnemonic --help\n" \
+        "    $mnemonic --version\n" \
+        ""
+
+    for analyzer in "${analyzers[@]}"; do
+        printf "%b" \
+            "    $mnemonic --analyzer $analyzer\n" \
+            ""
+    done
 }
 
 function display_version()
@@ -63,9 +86,24 @@ function display_version()
     echo "$mnemonic, version $version"
 }
 
+function value_is_in_array()
+{
+    local -r target_value="$1"; shift
+    local -r array=( "$@" )
+
+    local value
+    for value in "${array[@]}"; do
+        if [[ "$target_value" == "$value" ]]; then
+            return 0;
+        fi
+    done
+
+    return 1
+}
+
 function run_shellcheck()
 {
-    local scripts; mapfile -t scripts < <( git -C "$repository" ls-files | xargs -r -d '\n' -I '{}' find "$repository/{}" -executable ); readonly scripts
+    local scripts; mapfile -t scripts < <( git -C "$repository" ls-files '*.sh' | xargs -r -d '\n' -I '{}' find "$repository/{}" ); readonly scripts
 
     if ! shellcheck "${scripts[@]}"; then
         abort
@@ -81,9 +119,16 @@ function main()
 {
     local -r script=$( readlink -f "$0" )
     local -r mnemonic=$( basename "$script" )
+
+    validate_script
+
     local -r repository=$( readlink -f "$( dirname "$script" )/.." )
     local -r version=$( git -C "$repository" describe --match=none --always --dirty --broken )
 
+    local -r analyzers=(
+        shellcheck
+    )
+
     while [[ "$#" -gt 0 ]]; do
         local argument="$1"; shift
 
@@ -99,7 +144,7 @@ function main()
 
                 local -r analyzer="$1"; shift
 
-                if [[ "$analyzer" != "shellcheck" ]]; then
+                if ! value_is_in_array "$analyzer" "${analyzers[@]}"; then
                     abort "'$analyzer' is not a supported analyzer"
                 fi
                 ;;
diff --git a/git/hooks/install b/git/hooks/install
deleted file mode 100755
index 626afb6..0000000
--- a/git/hooks/install
+++ /dev/null
@@ -1,152 +0,0 @@
-#!/usr/bin/env bash
-
-# build-avr-gcc
-#
-# Copyright 2019, 2021-2024, Andrew Countryman <apcountryman@gmail.com> and the
-# build-avr-gcc contributors
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may not use this
-# file except in compliance with the License. You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software distributed under
-# the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied. See the License for the specific language governing
-# permissions and limitations under the License.
-
-# Description: Git hooks install script.
-
-function error()
-{
-    local -r message="$1"
-
-    ( >&2 echo "$mnemonic: $message" )
-}
-
-function abort()
-{
-    if [[ "$#" -gt 0 ]]; then
-        local -r message="$1"
-
-        error "$message, aborting"
-    fi
-
-    exit 1
-}
-
-function display_help_text()
-{
-    echo "NAME"
-    echo "    $mnemonic - Install the build-avr-gcc repository's Git hooks."
-    echo "SYNOPSIS"
-    echo "    $mnemonic --help"
-    echo "    $mnemonic --version"
-    echo "    $mnemonic --all"
-    echo "    $mnemonic [<hooks>]"
-    echo "OPTIONS"
-    echo "    --all"
-    echo "        Install all supported hooks."
-    echo "    --help"
-    echo "        Display this help text."
-    echo "    --version"
-    echo "        Display the version of this script."
-    echo "    <hooks>"
-    echo "        The whitespace separated list of hooks to install. The following hooks"
-    echo "        are supported:"
-
-    for hook in "${supported_hooks[@]}"; do
-        echo "            $hook"
-    done
-
-    echo "EXAMPLES"
-    echo "    $mnemonic --help"
-    echo "    $mnemonic --version"
-    echo "    $mnemonic --all"
-    echo "    $mnemonic ${supported_hooks[*]}"
-}
-
-function display_version()
-{
-    echo "$mnemonic, version $version"
-}
-
-function valid_hook()
-{
-    local -r hook="$1"
-
-    for supported_hook in "${supported_hooks[@]}"; do
-        if [[ "$hook" == "$supported_hook" ]]; then
-            return 0
-        fi
-    done
-
-    return 1
-}
-
-function validate_hooks()
-{
-    for hook in "${selected_hooks[@]}"; do
-        if ! valid_hook "$hook"; then
-            abort "'$hook' is not a supported hook"
-        fi
-    done
-}
-
-function install_hooks()
-{
-    for hook in "${selected_hooks[@]}"; do
-        rm -f "$repository/.git/hooks/$hook"
-
-        if ! ln -s "$hooks/$hook" "$repository/.git/hooks/$hook" > "/dev/null"; then
-            abort "'$hook' installation failure"
-        fi
-    done
-}
-
-function main()
-{
-    local -r script=$( readlink -f "$0" )
-    local -r mnemonic=$( basename "$script" )
-    local -r hooks=$( dirname "$script" )
-    local -r repository=$( readlink -f "$hooks/../.." )
-    local -r version=$( git -C "$repository" describe --match=none --always --dirty --broken )
-
-    local supported_hooks; mapfile -t supported_hooks < <( git -C "$repository" ls-files 'git/hooks/' ':!:git/hooks/install' | xargs -r -d '\n' -I '{}' find "$repository/{}" -executable -printf '%f\n' ); readonly supported_hooks
-
-    local selected_hooks=()
-
-    while [[ "$#" -gt 0 ]]; do
-        local argument="$1"; shift
-
-        case "$argument" in
-            --all)
-                selected_hooks=( "${supported_hooks[@]}" )
-                break
-                ;;
-            --help)
-                display_help_text
-                exit
-                ;;
-            --version)
-                display_version
-                exit
-                ;;
-            --*)
-                ;&
-            -*)
-                abort "'$argument' is not a supported option"
-                ;;
-            *)
-                selected_hooks+=( "$argument" )
-                ;;
-        esac
-    done
-
-    readonly selected_hooks
-
-    validate_hooks
-    install_hooks
-}
-
-main "$@"
diff --git a/git/hooks/install.sh b/git/hooks/install.sh
new file mode 100755
index 0000000..5aceac5
--- /dev/null
+++ b/git/hooks/install.sh
@@ -0,0 +1,123 @@
+#!/usr/bin/env bash
+
+# build-avr-gcc
+#
+# Copyright 2019, 2021-2024, Andrew Countryman <apcountryman@gmail.com> and the
+# build-avr-gcc contributors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not use this
+# file except in compliance with the License. You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software distributed under
+# the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied. See the License for the specific language governing
+# permissions and limitations under the License.
+
+# Description: Git hooks install script.
+
+function error()
+{
+    local -r message="$1"
+
+    ( >&2 echo "$mnemonic: $message" )
+}
+
+function abort()
+{
+    if [[ "$#" -gt 0 ]]; then
+        local -r message="$1"
+
+        error "$message, aborting"
+    fi
+
+    exit 1
+}
+
+function validate_script()
+{
+    if ! shellcheck "$script"; then
+        abort
+    fi
+}
+
+function display_help_text()
+{
+    printf "%b" \
+        "NAME\n" \
+        "    $mnemonic - Install Git hooks.\n" \
+        "SYNOPSIS\n" \
+        "    $mnemonic --help\n" \
+        "    $mnemonic --version\n" \
+        "    $mnemonic\n" \
+        "OPTIONS\n" \
+        "    --help\n" \
+        "        Display this help text.\n" \
+        "    --version\n" \
+        "        Display the version of this script.\n" \
+        "EXAMPLES\n" \
+        "    $mnemonic --help\n" \
+        "    $mnemonic --version\n" \
+        "    $mnemonic\n" \
+        ""
+}
+
+function display_version()
+{
+    echo "$mnemonic, version $version"
+}
+
+function install_git_hooks()
+{
+    local hook_scripts; mapfile -t hook_scripts < <( git -C "$repository" ls-files 'git/hooks/' ':!:git/hooks/install.sh' | xargs -r -d '\n' -I '{}' find "$repository/{}" ); readonly hook_scripts
+
+    local hook_script
+    for hook_script in "${hook_scripts[@]}"; do
+        local hook; hook=$( basename "$hook_script" | cut -f 1 -d '.' )
+
+        rm -f "$repository/.git/hooks/$hook"
+
+        if ! ln -s "$hook_script" "$repository/.git/hooks/$hook"; then
+            abort "'$hook' installation failure"
+        fi
+    done
+}
+
+function main()
+{
+    local -r script=$( readlink -f "$0" )
+    local -r mnemonic=$( basename "$script" )
+
+    validate_script
+
+    local -r repository=$( readlink -f "$( dirname "$script" )/../.." )
+    local -r version=$( git -C "$repository" describe --match=none --always --dirty --broken )
+
+    while [[ "$#" -gt 0 ]]; do
+        local argument="$1"; shift
+
+        case "$argument" in
+            --help)
+                display_help_text
+                exit
+                ;;
+            --version)
+                display_version
+                exit
+                ;;
+            --*)
+                ;&
+            -*)
+                abort "'$argument' is not a supported option"
+                ;;
+            *)
+                abort "'$argument' is not a valid argument"
+                ;;
+        esac
+    done
+
+    install_git_hooks
+}
+
+main "$@"
diff --git a/git/hooks/pre-commit b/git/hooks/pre-commit.sh
similarity index 64%
rename from git/hooks/pre-commit
rename to git/hooks/pre-commit.sh
index c63c33d..0e37c8f 100755
--- a/git/hooks/pre-commit
+++ b/git/hooks/pre-commit.sh
@@ -17,18 +17,6 @@
 
 # Description: Git pre-commit hook script.
 
-function message()
-{
-    local -r content="$1"
-
-    echo -n "$mnemonic: $content"
-}
-
-function errors_found()
-{
-    echo "error(s) found"
-}
-
 function error()
 {
     local -r message="$1"
@@ -47,26 +35,32 @@ function abort()
     exit 1
 }
 
+function validate_script()
+{
+    if ! shellcheck "$script"; then
+        abort
+    fi
+}
+
 function display_help_text()
 {
-    echo "NAME"
-    echo "    $mnemonic - Ensure:"
-    echo "        - Filenames are portable"
-    echo "        - No whitespace errors are present"
-    echo "        - No script errors are present"
-    echo "SYNOPSIS"
-    echo "    $mnemonic --help"
-    echo "    $mnemonic --version"
-    echo "    $mnemonic"
-    echo "OPTIONS"
-    echo "    --help"
-    echo "        Display this help text."
-    echo "    --version"
-    echo "        Display the version of this script."
-    echo "EXAMPLES"
-    echo "    $mnemonic --help"
-    echo "    $mnemonic --version"
-    echo "    $mnemonic"
+    printf "%b" \
+        "NAME\n" \
+        "    $mnemonic - Ensure commit preconditions are met.\n" \
+        "SYNOPSIS\n" \
+        "    $mnemonic --help\n" \
+        "    $mnemonic --version\n" \
+        "    $mnemonic" \
+        "OPTIONS\n" \
+        "    --help\n" \
+        "        Display this help text.\n" \
+        "    --version\n" \
+        "        Display the version of this script.\n" \
+        "EXAMPLES\n" \
+        "    $mnemonic --help\n" \
+        "    $mnemonic --version\n" \
+        "    $mnemonic\n" \
+        ""
 }
 
 function display_version()
@@ -74,55 +68,84 @@ function display_version()
     echo "$mnemonic, version $version"
 }
 
+function message()
+{
+    local -r content="$1"
+    local -r content_length=${#content}
+    local -r content_length_max=47
+    local -r ellipsis_count_min=3
+    local -r ellipsis_count=$(( content_length_max - content_length + ellipsis_count_min ))
+
+    if [[ "$ellipsis_count" -lt "$ellipsis_count_min" ]]; then
+        abort "increase content_length_max (ellipsis_count=$ellipsis_count)"
+    fi
+
+    local -r ellipsis=$( head -c "$ellipsis_count" < /dev/zero | tr '\0' '.' )
+
+    echo -n "$mnemonic: $content $ellipsis "
+}
+
+function message_status_no_errors_found()
+{
+    echo "none"
+}
+
+function message_status_errors_found()
+{
+    echo "error(s) found"
+}
+
 function ensure_filenames_are_portable()
 {
-    message "checking for non-portable (non-ASCII) filenames ... "
+    message "checking for non-portable (non-ASCII) filenames"
 
     if [[ $( git -C "$repository" diff --cached --name-only --diff-filter=A -z "$against" | LC_ALL=C tr -d '[ -~]\0' | wc -c ) != 0 ]]; then
-        errors_found
+        message_status_errors_found
         error "aborting commit due to non-portable (non-ASCII) filename(s)"
         abort
     fi
 
-    echo "none"
+    message_status_no_errors_found
 }
 
 function ensure_no_whitespace_errors_are_present()
 {
-    message "checking for whitespace errors .................... "
+    message "checking for whitespace errors"
 
     if ! git -C "$repository" diff-index --check --cached "$against" -- > "/dev/null" 2>&1; then
-        errors_found
+        message_status_errors_found
         error "aborting commit due to whitespace error(s), listed below"
         git -C "$repository" diff-index --check --cached "$against" --
         abort
     fi
 
-    echo "none"
+    message_status_no_errors_found
 }
 
 function ensure_no_script_errors_are_present()
 {
-    message "checking for script errors ........................ "
+    message "checking for script errors"
 
-    local scripts; mapfile -t scripts < <( git -C "$repository" ls-files | xargs -r -d '\n' -I '{}' find "$repository/{}" -executable ); readonly scripts
+    local scripts; mapfile -t scripts < <( git -C "$repository" ls-files '*.sh' | xargs -r -d '\n' -I '{}' find "$repository/{}" ); readonly scripts
 
     if ! shellcheck "${scripts[@]}" > "/dev/null" 2>&1; then
-        errors_found
+        message_status_errors_found
         error "aborting commit due to script error(s), listed below"
         shellcheck "${scripts[@]}"
         abort
     fi
 
-    echo "none"
+    message_status_no_errors_found
 }
 
 function main()
 {
     local -r script=$( readlink -f "$0" )
     local -r mnemonic=$( basename "$script" )
-    local -r hooks=$( dirname "$script" )
-    local -r repository=$( readlink -f "$hooks/../.." )
+
+    validate_script
+
+    local -r repository=$( readlink -f "$( dirname "$script" )/../.." )
     local -r version=$( git -C "$repository" describe --match=none --always --dirty --broken )
 
     while [[ "$#" -gt 0 ]]; do
diff --git a/install-device-family-pack b/install-device-family-pack.sh
similarity index 82%
rename from install-device-family-pack
rename to install-device-family-pack.sh
index 86106bb..48b0990 100755
--- a/install-device-family-pack
+++ b/install-device-family-pack.sh
@@ -35,27 +35,36 @@ function abort()
     exit 1
 }
 
+function validate_script()
+{
+    if ! shellcheck "$script"; then
+        abort
+    fi
+}
+
 function display_help_text()
 {
-    echo "NAME"
-    echo "    $mnemonic - Install an avr-gcc device family pack."
-    echo "SYNOPSIS"
-    echo "    $mnemonic --help"
-    echo "    $mnemonic --version"
-    echo "    $mnemonic --install-prefix <install-prefix> --family-pack <name> <version>"
-    echo "OPTIONS"
-    echo "    --family-pack <name> <version>"
-    echo "        Specify the name and version of the device family pack to install."
-    echo "    --help"
-    echo "        Display this help text."
-    echo "    --install-prefix <install-prefix>"
-    echo "        Specify avr-gcc's install prefix."
-    echo "    --version"
-    echo "        Display the version of this script."
-    echo "EXAMPLES"
-    echo "    $mnemonic --help"
-    echo "    $mnemonic --version"
-    echo "    $mnemonic --install-prefix ~/bin/avr-gcc/8.3.0 --family-pack ATmega 2.0.401"
+    printf "%b" \
+        "NAME\n" \
+        "    $mnemonic - Install an avr-gcc device family pack.\n" \
+        "SYNOPSIS\n" \
+        "    $mnemonic --help\n" \
+        "    $mnemonic --version\n" \
+        "    $mnemonic --install-prefix <install-prefix> --family-pack <name> <version>\n" \
+        "OPTIONS\n" \
+        "    --family-pack <name> <version>\n" \
+        "        Specify the name and version of the device family pack to install.\n" \
+        "    --help\n" \
+        "        Display this help text.\n" \
+        "    --install-prefix <install-prefix>\n" \
+        "        Specify avr-gcc's install prefix.\n" \
+        "    --version\n" \
+        "        Display the version of this script.\n" \
+        "EXAMPLES\n" \
+        "    $mnemonic --help\n" \
+        "    $mnemonic --version\n" \
+        "    $mnemonic --install-prefix ~/bin/avr-gcc/9.3.0 --family-pack ATmega 3.1.264\n" \
+        ""
 }
 
 function display_version()
@@ -83,6 +92,7 @@ function install_device_specs()
 
     local -r install_directory="$( find "$install_prefix/lib/gcc/avr" -type d -name "device-specs" )"
 
+    local device_spec
     for device_spec in "${device_specs[@]}"; do
         if ! cp "$device_spec" "$install_directory"; then
             abort "$device_spec install failure"
@@ -94,9 +104,11 @@ function install_device_startup_files_and_libraries()
 {
     local devices; mapfile -t devices < <( find "$build_directory/$family_pack/gcc/dev" -mindepth 1 -maxdepth 1 -type d ); readonly devices
 
+    local device
     for device in "${devices[@]}"; do
         local device_startup_files_and_libraries; mapfile -t device_startup_files_and_libraries < <( cd "$device" && find . -mindepth 1 -maxdepth 1 -type d ! -name "device-specs" )
 
+        local device_startup_file_and_library
         for device_startup_file_and_library in "${device_startup_files_and_libraries[@]}"; do
             if ! ( cd "$device" && tar -czvf "$device_startup_file_and_library.tar.gz" "$device_startup_file_and_library" && tar -xzvf "$device_startup_file_and_library.tar.gz" -C "$install_prefix/avr/lib" ); then
                 abort "$device $device_startup_file_and_library install failure"
@@ -110,6 +122,7 @@ function install_header_files()
 {
     local header_files; mapfile -t header_files < <( find "$build_directory/$family_pack/include/avr" -name "*.h" ); readonly header_files
 
+    local header_file
     for header_file in "${header_files[@]}"; do
         if ! cp "$header_file" "$install_prefix/avr/include/avr/"; then
             abort "$header_file install failure"
@@ -138,6 +151,9 @@ function main()
 {
     local -r script=$( readlink -f "$0" )
     local -r mnemonic=$( basename "$script" )
+
+    validate_script
+
     local -r repository=$( dirname "$script" )
     local -r version=$( git -C "$repository" describe --match=none --always --dirty --broken )