EC2でyum install libwebpをしたいがうまくいかない

Question

EC2上でPHP 7.1.23でLaravelを使っています。
composer updateをしたいのですが、yum install libwebpをしたところで止まってしまっています。
解決策教えてください。

[ec2-user]$ composer update
Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Installation request for simplesoftwareio/simple-qrcode 2.0.0 -> satisfiable by simplesoftwareio/simple-qrcode[2.0.0].
    - simplesoftwareio/simple-qrcode 2.0.0 requires ext-gd * -> the requested PHP extension gd is missing from your system.

  To enable extensions, verify that they are enabled in your .ini files:
    - /etc/php.ini
    - /etc/php-7.1.d/20-bz2.ini
    - /etc/php-7.1.d/20-calendar.ini
    - /etc/php-7.1.d/20-ctype.ini
    - /etc/php-7.1.d/20-curl.ini
    - /etc/php-7.1.d/20-dom.ini
    - /etc/php-7.1.d/20-exif.ini
    - /etc/php-7.1.d/20-fileinfo.ini
    - /etc/php-7.1.d/20-ftp.ini
    - /etc/php-7.1.d/20-gettext.ini
    - /etc/php-7.1.d/20-iconv.ini
    - /etc/php-7.1.d/20-json.ini
    - /etc/php-7.1.d/20-mbstring.ini
    - /etc/php-7.1.d/20-mcrypt.ini
    - /etc/php-7.1.d/20-mysqlnd.ini
    - /etc/php-7.1.d/20-pdo.ini
    - /etc/php-7.1.d/20-phar.ini
    - /etc/php-7.1.d/20-posix.ini
    - /etc/php-7.1.d/20-shmop.ini
    - /etc/php-7.1.d/20-simplexml.ini
    - /etc/php-7.1.d/20-sockets.ini
    - /etc/php-7.1.d/20-sqlite3.ini
    - /etc/php-7.1.d/20-sysvmsg.ini
    - /etc/php-7.1.d/20-sysvsem.ini
    - /etc/php-7.1.d/20-sysvshm.ini
    - /etc/php-7.1.d/20-tokenizer.ini
    - /etc/php-7.1.d/20-xml.ini
    - /etc/php-7.1.d/20-xmlwriter.ini
    - /etc/php-7.1.d/20-xsl.ini
    - /etc/php-7.1.d/20-zip.ini
    - /etc/php-7.1.d/30-mysqli.ini
    - /etc/php-7.1.d/30-pdo_mysql.ini
    - /etc/php-7.1.d/30-pdo_sqlite.ini
    - /etc/php-7.1.d/30-wddx.ini
    - /etc/php-7.1.d/30-xmlreader.ini
    - /etc/php-7.1.d/php.ini
  You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.

調べてみると、php-curlとphp-gdが必要とのことなので、

[ec2-user]$ sudo yum --enablerepo=remi-php71 --disablerepo=amzn-main install php71-curl php71-gd
oaded plugins: priorities, update-motd, upgrade-helper
8 packages excluded due to repository priority protections
Package php71-common-7.1.23-1.34.amzn1.x86_64 already installed and latest version
Resolving Dependencies
--> Running transaction check
---> Package php71-gd.x86_64 0:7.1.23-1.34.amzn1 will be installed
--> Processing Dependency: libwebp.so.4()(64bit) for package: php71-gd-7.1.23-1.34.amzn1.x86_64
--> Finished Dependency Resolution
Error: Package: php71-gd-7.1.23-1.34.amzn1.x86_64 (amzn-updates)
           Requires: libwebp.so.4()(64bit)
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest

libwebpが必要なので

[ec2-user]$ sudo yum install libwebp
Loaded plugins: priorities, update-motd, upgrade-helper
amzn-main                                                                                               | 2.1 kB  00:00:00     
amzn-updates                                                                                            | 2.5 kB  00:00:00     
30 packages excluded due to repository priority protections
Package matching libwebp-0.3.0-3.5.amzn1.x86_64 already installed. Checking for update.
Nothing to do

こちらも試しました。

sudo yum --enablerepo=remi-php71 --disablerepo=amzn-main install libwebp
oaded plugins: priorities, update-motd, upgrade-helper
amzn-updates                                                                                            | 2.5 kB  00:00:00     
8 packages excluded due to repository priority protections
Nothing to do

ここからどうしていいかわからなくなっています。
よろしくお願いします。

Answer 1

以下の方法で解決しました。

$ sudo yum remove libwebp

$ sudo yum --enablerepo=remi-php71  install php71-gd

$ composer update