diff --git a/config/pkg/lib/imap.yml b/config/pkg/lib/imap.yml
new file mode 100644
index 00000000..cb2ec410
--- /dev/null
+++ b/config/pkg/lib/imap.yml
@@ -0,0 +1,14 @@
+imap:
+  type: library
+  artifact:
+    source: {
+      "type": "git",
+      "url": "https://github.com/static-php/imap.git",
+      "rev": "master"
+    }
+    metadata:
+      license-files: [LICENSE]
+  static-libs@unix:
+    - libc-client.a
+  suggests@unix:
+    - openssl
diff --git a/src/Package/Library/imap.php b/src/Package/Library/imap.php
index 69e6c882..607d78ee 100644
--- a/src/Package/Library/imap.php
+++ b/src/Package/Library/imap.php
@@ -6,10 +6,15 @@ namespace Package\Library;
 
 use Package\Target\php;
 use StaticPHP\Attribute\Package\AfterStage;
+use StaticPHP\Attribute\Package\BuildFor;
 use StaticPHP\Attribute\Package\Library;
+use StaticPHP\Attribute\Package\PatchBeforeBuild;
 use StaticPHP\Attribute\PatchDescription;
+use StaticPHP\Package\LibraryPackage;
+use StaticPHP\Package\PackageInstaller;
 use StaticPHP\Runtime\SystemTarget;
 use StaticPHP\Util\FileSystem;
+use StaticPHP\Util\SourcePatcher;
 
 #[Library('imap')]
 class imap
@@ -22,4 +27,91 @@ class imap
             FileSystem::replaceFileRegex(BUILD_BIN_PATH . '/php-config', '/^libs="(.*)"$/m', 'libs="$1 -lcrypt"');
         }
     }
+
+    #[PatchBeforeBuild]
+    #[PatchDescription('Patch imap build system for Linux and macOS compatibility')]
+    public function patchBeforeBuild(LibraryPackage $lib): void
+    {
+        if (SystemTarget::getTargetOS() === 'Linux') {
+            $cc = getenv('CC') ?: 'gcc';
+            // FileSystem::replaceFileStr($lib->getSourceDir() . '/Makefile', '-DMAC_OSX_KLUDGE=1', '');
+            FileSystem::replaceFileStr("{$lib->getSourceDir()}/src/osdep/unix/Makefile", 'CC=cc', "CC={$cc}");
+            /* FileSystem::replaceFileStr($lib->getSourceDir() . '/src/osdep/unix/Makefile', '-lcrypto -lz', '-lcrypto');
+            FileSystem::replaceFileStr($lib->getSourceDir() . '/src/osdep/unix/Makefile', '-lcrypto', '-lcrypto -lz');
+            FileSystem::replaceFileStr(
+                $lib->getSourceDir() . '/src/osdep/unix/ssl_unix.c',
+                "#include <x509v3.h>\n#include <ssl.h>",
+                "#include <ssl.h>\n#include <x509v3.h>"
+            );
+            // SourcePatcher::patchFile('1006_openssl1.1_autoverify.patch', $lib->getSourceDir());
+            SourcePatcher::patchFile('2014_openssl1.1.1_sni.patch', $lib->getSourceDir()); */
+            FileSystem::replaceFileStr("{$lib->getSourceDir()}/Makefile", 'SSLINCLUDE=/usr/include/openssl', "SSLINCLUDE={$lib->getIncludeDir()}");
+            FileSystem::replaceFileStr("{$lib->getSourceDir()}/Makefile", 'SSLLIB=/usr/lib', "SSLLIB={$lib->getLibDir()}");
+        } elseif (SystemTarget::getTargetOS() === 'Darwin') {
+            $cc = getenv('CC') ?: 'clang';
+            SourcePatcher::patchFile('0001_imap_macos.patch', $lib->getSourceDir());
+            FileSystem::replaceFileStr($lib->getSourceDir() . '/src/osdep/unix/Makefile', 'CC=cc', "CC={$cc}");
+            FileSystem::replaceFileStr($lib->getSourceDir() . '/Makefile', 'SSLINCLUDE=/usr/include/openssl', 'SSLINCLUDE=' . $lib->getIncludeDir());
+            FileSystem::replaceFileStr($lib->getSourceDir() . '/Makefile', 'SSLLIB=/usr/lib', 'SSLLIB=' . $lib->getLibDir());
+        }
+    }
+
+    #[BuildFor('Linux')]
+    public function buildLinux(LibraryPackage $lib, PackageInstaller $installer): void
+    {
+        if ($installer->isPackageResolved('openssl')) {
+            $ssl_options = "SPECIALAUTHENTICATORS=ssl SSLTYPE=unix.nopwd SSLINCLUDE={$lib->getIncludeDir()} SSLLIB={$lib->getLibDir()}";
+        } else {
+            $ssl_options = 'SSLTYPE=none';
+        }
+        $libcVer = SystemTarget::getLibcVersion();
+        $extraLibs = $libcVer && version_compare($libcVer, '2.17', '<=') ? 'EXTRALDFLAGS="-ldl -lrt -lpthread"' : '';
+        shell()->cd($lib->getSourceDir())
+            ->exec('make clean')
+            ->exec('touch ip6')
+            ->exec('chmod +x tools/an')
+            ->exec('chmod +x tools/ua')
+            ->exec('chmod +x src/osdep/unix/drivers')
+            ->exec('chmod +x src/osdep/unix/mkauths')
+            ->exec("yes | make slx {$ssl_options} EXTRACFLAGS='-fPIC -Wno-implicit-function-declaration -Wno-incompatible-function-pointer-types' {$extraLibs}");
+        try {
+            shell()
+                ->exec("cp -rf {$lib->getSourceDir()}/c-client/c-client.a {$lib->getLibDir()}/libc-client.a")
+                ->exec("cp -rf {$lib->getSourceDir()}/c-client/*.c {$lib->getLibDir()}/")
+                ->exec("cp -rf {$lib->getSourceDir()}/c-client/*.h {$lib->getIncludeDir()}/")
+                ->exec("cp -rf {$lib->getSourceDir()}/src/osdep/unix/*.h {$lib->getIncludeDir()}/");
+        } catch (\Throwable) {
+            // last command throws an exception, no idea why since it works
+        }
+    }
+
+    #[BuildFor('Darwin')]
+    public function buildDarwin(LibraryPackage $lib, PackageInstaller $installer): void
+    {
+        if ($installer->isPackageResolved('openssl')) {
+            $ssl_options = "SPECIALAUTHENTICATORS=ssl SSLTYPE=unix.nopwd SSLINCLUDE={$lib->getIncludeDir()} SSLLIB={$lib->getLibDir()}";
+        } else {
+            $ssl_options = 'SSLTYPE=none';
+        }
+        $out = shell()->execWithResult('echo "-include $(xcrun --show-sdk-path)/usr/include/poll.h -include $(xcrun --show-sdk-path)/usr/include/time.h -include $(xcrun --show-sdk-path)/usr/include/utime.h"')[1][0];
+        shell()->cd($lib->getSourceDir())
+            ->exec('make clean')
+            ->exec('touch ip6')
+            ->exec('chmod +x tools/an')
+            ->exec('chmod +x tools/ua')
+            ->exec('chmod +x src/osdep/unix/drivers')
+            ->exec('chmod +x src/osdep/unix/mkauths')
+            ->exec(
+                "echo y | make osx {$ssl_options} EXTRACFLAGS='-Wno-implicit-function-declaration -Wno-incompatible-function-pointer-types {$out}'"
+            );
+        try {
+            shell()
+                ->exec("cp -rf {$lib->getSourceDir()}/c-client/c-client.a {$lib->getLibDir()}/libc-client.a")
+                ->exec("cp -rf {$lib->getSourceDir()}/c-client/*.c {$lib->getLibDir()}/")
+                ->exec("cp -rf {$lib->getSourceDir()}/c-client/*.h {$lib->getIncludeDir()}/")
+                ->exec("cp -rf {$lib->getSourceDir()}/src/osdep/unix/*.h {$lib->getIncludeDir()}/");
+        } catch (\Throwable) {
+            // last command throws an exception, no idea why since it works
+        }
+    }
 }
diff --git a/src/StaticPHP/Package/PackageInstaller.php b/src/StaticPHP/Package/PackageInstaller.php
index a01d29fc..80ea1aef 100644
--- a/src/StaticPHP/Package/PackageInstaller.php
+++ b/src/StaticPHP/Package/PackageInstaller.php
@@ -13,6 +13,7 @@ use StaticPHP\DI\ApplicationContext;
 use StaticPHP\Exception\WrongUsageException;
 use StaticPHP\Registry\PackageLoader;
 use StaticPHP\Runtime\SystemTarget;
+use StaticPHP\Util\BuildRootTracker;
 use StaticPHP\Util\DependencyResolver;
 use StaticPHP\Util\DirDiff;
 use StaticPHP\Util\FileSystem;
@@ -42,6 +43,9 @@ class PackageInstaller
     /** @var bool Whether to download missing sources automatically */
     protected bool $download = true;
 
+    /** @var null|BuildRootTracker buildroot file tracker for debugging purpose */
+    protected ?BuildRootTracker $tracker = null;
+
     public function __construct(protected array $options = [])
     {
         ApplicationContext::set(PackageInstaller::class, $this);
@@ -53,6 +57,11 @@ class PackageInstaller
         if (!empty($options['no-download'])) {
             $this->download = false;
         }
+
+        // Initialize BuildRootTracker if tracking is enabled (default: enabled unless --no-tracker)
+        if (empty($options['no-tracker'])) {
+            $this->tracker = new BuildRootTracker();
+        }
     }
 
     /**
@@ -111,6 +120,16 @@ class PackageInstaller
         return $this;
     }
 
+    /**
+     * Get the BuildRootTracker instance.
+     *
+     * @return null|BuildRootTracker The tracker instance or null if tracking is disabled
+     */
+    public function getTracker(): ?BuildRootTracker
+    {
+        return $this->tracker;
+    }
+
     public function printBuildPackageOutputs(): void
     {
         foreach ($this->build_packages as $package) {
@@ -183,8 +202,14 @@ class PackageInstaller
                     InteractiveTerm::indicateProgress('Installing package: ' . ConsoleColor::yellow($package->getName()));
                 }
                 try {
+                    // Start tracking for binary installation
+                    $this->tracker?->startTracking($package, 'install');
                     $status = $this->installBinary($package);
+                    // Stop tracking and record changes
+                    $this->tracker?->stopTracking();
                 } catch (\Throwable $e) {
+                    // Stop tracking on error
+                    $this->tracker?->stopTracking();
                     if ($interactive) {
                         InteractiveTerm::finish('Installing binary package failed: ' . ConsoleColor::red($package->getName()), false);
                         echo PHP_EOL;
@@ -199,6 +224,9 @@ class PackageInstaller
                     InteractiveTerm::indicateProgress('Building package: ' . ConsoleColor::yellow($package->getName()));
                 }
                 try {
+                    // Start tracking for build
+                    $this->tracker?->startTracking($package, 'build');
+
                     if ($is_to_build && ($this->options['pack-mode'] ?? false) === true) {
                         $dirdiff = new DirDiff(BUILD_ROOT_PATH, false);
                         ApplicationContext::set(DirDiff::class, $dirdiff);
@@ -209,7 +237,12 @@ class PackageInstaller
                     if ($is_to_build && ($this->options['pack-mode'] ?? false) === true) {
                         $package->runStage('packPrebuilt');
                     }
+
+                    // Stop tracking and record changes
+                    $this->tracker?->stopTracking();
                 } catch (\Throwable $e) {
+                    // Stop tracking on error
+                    $this->tracker?->stopTracking();
                     if ($interactive) {
                         InteractiveTerm::finish('Building package failed: ' . ConsoleColor::red($package->getName()), false);
                         echo PHP_EOL;
diff --git a/src/StaticPHP/Util/BuildRootTracker.php b/src/StaticPHP/Util/BuildRootTracker.php
new file mode 100644
index 00000000..306bf90c
--- /dev/null
+++ b/src/StaticPHP/Util/BuildRootTracker.php
@@ -0,0 +1,189 @@
+<?php
+
+declare(strict_types=1);
+
+namespace StaticPHP\Util;
+
+use StaticPHP\Package\Package;
+
+/**
+ * BuildRootTracker tracks which files in buildroot directory are created/modified by which package.
+ * This helps to understand the file provenance and manage build artifacts.
+ */
+class BuildRootTracker
+{
+    /** @var array<string, array{package: string, type: string, files: array<string>}> Tracking data */
+    protected array $tracking_data = [];
+
+    protected static string $tracker_file = BUILD_ROOT_PATH . '/.spc-tracker.json';
+
+    protected ?DirDiff $current_diff = null;
+
+    protected ?string $current_package = null;
+
+    protected ?string $current_type = null;
+
+    public function __construct()
+    {
+        $this->loadTrackingData();
+    }
+
+    /**
+     * Start tracking for a package.
+     *
+     * @param Package $package The package to track
+     * @param string  $type    The operation type: 'build' or 'install'
+     */
+    public function startTracking(Package $package, string $type = 'build'): void
+    {
+        $this->current_package = $package->getName();
+        $this->current_type = $type;
+        $this->current_diff = new DirDiff(BUILD_ROOT_PATH, false);
+    }
+
+    /**
+     * Stop tracking and record the changes.
+     */
+    public function stopTracking(): void
+    {
+        if ($this->current_diff === null || $this->current_package === null) {
+            return;
+        }
+
+        $increment_files = $this->current_diff->getIncrementFiles(true);
+
+        if ($increment_files !== []) {
+            // Remove buildroot prefix if exists and normalize paths
+            $normalized_files = array_map(function ($file) {
+                // Remove leading slashes
+                return ltrim($file, '/\\');
+            }, $increment_files);
+
+            $this->tracking_data[$this->current_package] = [
+                'package' => $this->current_package,
+                'type' => $this->current_type,
+                'files' => array_values($normalized_files),
+                'time' => date('Y-m-d H:i:s'),
+            ];
+
+            $this->saveTrackingData();
+        }
+
+        $this->current_diff = null;
+        $this->current_package = null;
+        $this->current_type = null;
+    }
+
+    /**
+     * Get tracking data for a specific package.
+     *
+     * @param  string     $package_name Package name
+     * @return null|array Tracking data or null if not found
+     */
+    public function getPackageTracking(string $package_name): ?array
+    {
+        return $this->tracking_data[$package_name] ?? null;
+    }
+
+    /**
+     * Get all tracking data.
+     *
+     * @return array<string, array> All tracking data
+     */
+    public function getAllTracking(): array
+    {
+        return $this->tracking_data;
+    }
+
+    /**
+     * Find which package introduced a specific file.
+     *
+     * @param  string      $file File path (relative to buildroot)
+     * @return null|string Package name or null if not found
+     */
+    public function findFileSource(string $file): ?string
+    {
+        $file = ltrim($file, '/\\');
+        foreach ($this->tracking_data as $package_name => $data) {
+            if (in_array($file, $data['files'], true)) {
+                return $package_name;
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Clear tracking data for a specific package.
+     *
+     * @param string $package_name Package name
+     */
+    public function clearPackageTracking(string $package_name): void
+    {
+        unset($this->tracking_data[$package_name]);
+        $this->saveTrackingData();
+    }
+
+    /**
+     * Clear all tracking data.
+     */
+    public function clearAllTracking(): void
+    {
+        $this->tracking_data = [];
+        $this->saveTrackingData();
+    }
+
+    /**
+     * Get tracking statistics.
+     *
+     * @return array{total_packages: int, total_files: int, by_type: array<string, int>}
+     */
+    public function getStatistics(): array
+    {
+        $total_files = 0;
+        $by_type = [];
+
+        foreach ($this->tracking_data as $data) {
+            $total_files += count($data['files']);
+            $type = $data['type'];
+            $by_type[$type] = ($by_type[$type] ?? 0) + 1;
+        }
+
+        return [
+            'total_packages' => count($this->tracking_data),
+            'total_files' => $total_files,
+            'by_type' => $by_type,
+        ];
+    }
+
+    /**
+     * Get the tracker file path.
+     */
+    public static function getTrackerFilePath(): string
+    {
+        return self::$tracker_file;
+    }
+
+    /**
+     * Load tracking data from file.
+     */
+    protected function loadTrackingData(): void
+    {
+        if (is_file(self::$tracker_file)) {
+            $content = file_get_contents(self::$tracker_file);
+            $data = json_decode($content, true);
+            if (is_array($data)) {
+                $this->tracking_data = $data;
+            }
+        }
+    }
+
+    /**
+     * Save tracking data to file.
+     */
+    protected function saveTrackingData(): void
+    {
+        FileSystem::createDir(dirname(self::$tracker_file));
+        $content = json_encode($this->tracking_data, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
+        FileSystem::writeFile(self::$tracker_file, $content);
+    }
+}