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requirements"}},"is_authoritative":true,"body":{"_type":"trans","tr":{"en":"<p>For a first installation, follow <a href=\"\/id\/1526\">Set up a local development environment<\/a>. This page is the dependency checklist for a native build. The <a href=\"\/id\/1411\">container setup<\/a> supplies its own dependencies.<\/p>\n<h2>Required for this guide<\/h2>\n<table class=\"table\"><thead><tr><th>Tool<\/th><th>Purpose and check<\/th><\/tr><\/thead><tbody><tr><td>Erlang\/OTP 28<\/td><td>Recommended runtime and compiler. Use the check below; <code>erl -version<\/code> reports a different version number.<\/td><\/tr><tr><td>GNU Make and a C\/C++ toolchain<\/td><td>Build Zotonic and native dependencies. Check <code>make --version<\/code> and <code>c++ --version<\/code>.<\/td><\/tr><tr><td>Git<\/td><td>Fetch Zotonic and dependencies; check <code>git --version<\/code>.<\/td><\/tr><tr><td>PostgreSQL<\/td><td>Store CMS content. Use a supported release; the native walkthrough uses 16. Check <code>psql --version<\/code>, then test an actual connection.<\/td><\/tr><tr><td>ImageMagick<\/td><td>Process images. Check that <code>convert<\/code> and <code>identify<\/code> are available on Zotonic&#39;s command path.<\/td><\/tr><tr><td>gettext<\/td><td>Translation tooling; check <code>msgfmt --version<\/code>.<\/td><\/tr><tr><td><code>fswatch<\/code> on macOS or <code>inotifywait<\/code> on Linux<\/td><td>Detect source edits during development.<\/td><\/tr><\/tbody><\/table>\n<pre class=\"notranslate\"><code class=\"notranslate language-sh\">erl -noshell -eval &#39;io:format(&quot;~s~n&quot;, [erlang:system_info(otp_release)]), halt().&#39;\n<\/code><\/pre>\n<p>Expect <code>28<\/code>. The guide&#39;s recommendation is distinct from the minimum accepted by a particular checkout. Use the requirements of that checkout when maintaining older releases.<\/p>\n<p>A PostgreSQL client version does not prove a server is running. <a href=\"\/id\/3045\">Prepare local PostgreSQL<\/a> checks the connection, role, and database. Password authentication is not PostgreSQL&#39;s <code>trust<\/code> method; do not replace authentication rules with <code>trust<\/code> to fix a failed password.<\/p>\n<h2>Add tools when a feature needs them<\/h2>\n<p>Install FFmpeg for video processing, Ghostscript for applicable PDF\/image conversion, and any additional tools required by the modules you enable. You do not need every optional service before making a first template edit.<\/p>\n<h2>Platforms<\/h2>\n<p>Use the <a href=\"\/id\/3044\">macOS\/Linux installation walkthrough<\/a>, <a href=\"\/id\/3046\">Nix shell<\/a>, or <a href=\"\/id\/1411\">Docker\/Podman<\/a>. On Windows, use a Linux environment such as WSL or the container route. 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