diff --git a/config/pkg/lib/postgresql.yml b/config/pkg/lib/postgresql.yml
new file mode 100644
index 00000000..1237b184
--- /dev/null
+++ b/config/pkg/lib/postgresql.yml
@@ -0,0 +1,23 @@
+postgresql:
+  type: library
+  artifact:
+    source:
+      type: ghtagtar
+      repo: postgres/postgres
+      match: REL_18_\d+
+    metadata:
+      license-files: [COPYRIGHT]
+      license: PostgreSQL
+  depends:
+    - libiconv
+    - libxml2
+    - openssl
+    - zlib
+    - libedit
+  suggests:
+    - icu
+    - libxslt
+    - ldap
+    - zstd
+  pkg-configs:
+    - libpq
diff --git a/src/Package/Library/postgresql.php b/src/Package/Library/postgresql.php
index bd96da2c..84b4657e 100644
--- a/src/Package/Library/postgresql.php
+++ b/src/Package/Library/postgresql.php
@@ -6,12 +6,22 @@ namespace Package\Library;
 
 use Package\Target\php;
 use StaticPHP\Attribute\Package\BeforeStage;
+use StaticPHP\Attribute\Package\BuildFor;
 use StaticPHP\Attribute\Package\Library;
+use StaticPHP\Attribute\Package\PatchBeforeBuild;
 use StaticPHP\Attribute\PatchDescription;
+use StaticPHP\Exception\FileSystemException;
+use StaticPHP\Package\LibraryPackage;
+use StaticPHP\Package\PackageBuilder;
+use StaticPHP\Package\PackageInstaller;
 use StaticPHP\Package\TargetPackage;
+use StaticPHP\Runtime\SystemTarget;
+use StaticPHP\Util\FileSystem;
+use StaticPHP\Util\PkgConfigUtil;
+use StaticPHP\Util\SPCConfigUtil;
 
 #[Library('postgresql')]
-class postgresql
+class postgresql extends LibraryPackage
 {
     #[BeforeStage('php', [php::class, 'configureForUnix'], 'postgresql')]
     #[PatchDescription('Patch to avoid explicit_bzero detection issues on some systems')]
@@ -20,4 +30,111 @@ class postgresql
         shell()->cd($package->getSourceDir())
             ->exec('sed -i.backup "s/ac_cv_func_explicit_bzero\" = xyes/ac_cv_func_explicit_bzero\" = x_fake_yes/" ./configure');
     }
+
+    #[PatchBeforeBuild]
+    #[PatchDescription('Various patches before building PostgreSQL')]
+    public function patchBeforeBuild(): bool
+    {
+        // fix aarch64 build on glibc 2.17 (e.g. CentOS 7)
+        if (SystemTarget::getLibcVersion() === '2.17' && SystemTarget::getTargetArch() === 'aarch64') {
+            try {
+                FileSystem::replaceFileStr("{$this->getSourceDir()}/src/port/pg_popcount_aarch64.c", 'HWCAP_SVE', '0');
+                FileSystem::replaceFileStr(
+                    "{$this->getSourceDir()}/src/port/pg_crc32c_armv8_choose.c",
+                    '#if defined(__linux__) && !defined(__aarch64__) && !defined(HWCAP2_CRC32)',
+                    '#if defined(__linux__) && !defined(HWCAP_CRC32)'
+                );
+            } catch (FileSystemException) {
+                // allow file not-existence to make it compatible with old and new version
+            }
+        }
+
+        // skip the test on platforms where libpq infrastructure may be provided by statically-linked libraries
+        FileSystem::replaceFileStr("{$this->getSourceDir()}/src/interfaces/libpq/Makefile", 'invokes exit\'; exit 1;', 'invokes exit\';');
+        // disable shared libs build
+        FileSystem::replaceFileStr(
+            "{$this->getSourceDir()}/src/Makefile.shlib",
+            [
+                '$(LINK.shared) -o $@ $(OBJS) $(LDFLAGS) $(LDFLAGS_SL) $(SHLIB_LINK)',
+                '$(INSTALL_SHLIB) $< \'$(DESTDIR)$(pkglibdir)/$(shlib)\'',
+                '$(INSTALL_SHLIB) $< \'$(DESTDIR)$(libdir)/$(shlib)\'',
+                '$(INSTALL_SHLIB) $< \'$(DESTDIR)$(bindir)/$(shlib)\'',
+            ],
+            ''
+        );
+        return true;
+    }
+
+    #[BuildFor('Darwin')]
+    #[BuildFor('Linux')]
+    public function buildUnix(PackageInstaller $installer, PackageBuilder $builder): void
+    {
+        $spc_config = new SPCConfigUtil(['no_php' => true, 'libs_only_deps' => true]);
+        $config = $spc_config->getPackageDepsConfig('postgresql', array_keys($installer->getResolvedPackages()), include_suggests: $builder->getOption('with-suggests', false));
+
+        $env_vars = [
+            'CFLAGS' => $config['cflags'] . ' -std=c17',
+            'CPPFLAGS' => '-DPIC',
+            'LDFLAGS' => $config['ldflags'],
+            'LIBS' => $config['libs'],
+        ];
+
+        if ($ldLibraryPath = getenv('SPC_LD_LIBRARY_PATH')) {
+            $env_vars['LD_LIBRARY_PATH'] = $ldLibraryPath;
+        }
+
+        FileSystem::resetDir("{$this->getSourceDir()}/build");
+
+        // PHP source relies on the non-private encoding functions in libpgcommon.a
+        FileSystem::replaceFileStr(
+            "{$this->getSourceDir()}/src/common/Makefile",
+            '$(OBJS_FRONTEND): CPPFLAGS += -DUSE_PRIVATE_ENCODING_FUNCS',
+            '$(OBJS_FRONTEND): CPPFLAGS += -UUSE_PRIVATE_ENCODING_FUNCS -DFRONTEND',
+        );
+
+        // configure
+        $shell = shell()->cd("{$this->getSourceDir()}/build")->initializeEnv($this)
+            ->appendEnv($env_vars)
+            ->exec(
+                '../configure ' .
+                "--prefix={$this->getBuildRootPath()} " .
+                '--enable-coverage=no ' .
+                '--with-ssl=openssl ' .
+                '--with-readline ' .
+                '--with-libxml ' .
+                ($installer->isPackageResolved('icu') ? '--with-icu ' : '--without-icu ') .
+                ($installer->isPackageResolved('ldap') ? '--with-ldap ' : '--without-ldap ') .
+                ($installer->isPackageResolved('libxslt') ? '--with-libxslt ' : '--without-libxslt ') .
+                ($installer->isPackageResolved('zstd') ? '--with-zstd ' : '--without-zstd ') .
+                '--without-lz4 ' .
+                '--without-perl ' .
+                '--without-python ' .
+                '--without-pam ' .
+                '--without-bonjour ' .
+                '--without-tcl '
+            );
+
+        // patch ldap lib
+        if ($installer->isPackageResolved('ldap')) {
+            $libs = PkgConfigUtil::getLibsArray('ldap');
+            $libs = clean_spaces(implode(' ', $libs));
+            FileSystem::replaceFileStr("{$this->getSourceDir()}/build/config.status", '-lldap', $libs);
+            FileSystem::replaceFileStr("{$this->getSourceDir()}/build/src/Makefile.global", '-lldap', $libs);
+        }
+
+        $shell
+            ->exec('make -C src/bin/pg_config install')
+            ->exec('make -C src/include install')
+            ->exec('make -C src/common install')
+            ->exec('make -C src/port install')
+            ->exec('make -C src/interfaces/libpq install');
+
+        // remove dynamic libs
+        shell()->cd($this->getSourceDir() . '/build')
+            ->exec("rm -rf {$this->getBuildRootPath()}/lib/*.so.*")
+            ->exec("rm -rf {$this->getBuildRootPath()}/lib/*.so")
+            ->exec("rm -rf {$this->getBuildRootPath()}/lib/*.dylib");
+
+        FileSystem::replaceFileStr("{$this->getLibDir()}/pkgconfig/libpq.pc", '-lldap', '-lldap -llber');
+    }
 }