diff -up ./bin/composer.rpm ./bin/composer
--- ./bin/composer.rpm	2016-04-18 22:14:28.000000000 +0200
+++ ./bin/composer	2016-04-19 07:15:05.420424086 +0200
@@ -5,7 +5,7 @@ if (PHP_SAPI !== 'cli') {
     echo 'Warning: Composer should be invoked via the CLI version of PHP, not the '.PHP_SAPI.' SAPI'.PHP_EOL;
 }
 
-require __DIR__.'/../src/bootstrap.php';
+require '/usr/share/php/Composer/autoload.php';
 
 use Composer\Console\Application;
 
diff -up ./src/Composer/Autoload/AutoloadGenerator.php.rpm ./src/Composer/Autoload/AutoloadGenerator.php
--- ./src/Composer/Autoload/AutoloadGenerator.php.rpm	2016-04-18 22:14:28.000000000 +0200
+++ ./src/Composer/Autoload/AutoloadGenerator.php	2016-04-19 07:15:05.421424090 +0200
@@ -287,7 +287,7 @@ EOF;
         file_put_contents($targetDir.'/autoload_real.php', $this->getAutoloadRealFile(true, (bool) $includePathFileContents, $targetDirLoader, (bool) $includeFilesFileContents, $vendorPathCode, $appBaseDirCode, $suffix, $useGlobalIncludePath, $prependAutoloader));
 
         $this->safeCopy(__DIR__.'/ClassLoader.php', $targetDir.'/ClassLoader.php');
-        $this->safeCopy(__DIR__.'/../../../LICENSE', $targetDir.'/LICENSE');
+        $this->safeCopy((getenv('BUILDROOT')?:'') . '/usr/share/composer/LICENSE', $targetDir.'/LICENSE');
 
         if ($this->runScripts) {
             $this->eventDispatcher->dispatchScript(ScriptEvents::POST_AUTOLOAD_DUMP, $this->devMode, array(), array(
diff -up ./src/Composer/Compiler.php.rpm ./src/Composer/Compiler.php
--- ./src/Composer/Compiler.php.rpm	2016-04-18 22:14:28.000000000 +0200
+++ ./src/Composer/Compiler.php	2016-04-19 07:15:05.421424090 +0200
@@ -96,7 +96,7 @@ class Compiler
         $finder = new Finder();
         $finder->files()
             ->name('*.json')
-            ->in(__DIR__.'/../../res')
+            ->in((getenv('BUILDROOT')?:'') . '/usr/share/composer/res')
             ->in(SpdxLicenses::getResourcesDir())
             ->sort($finderSort)
         ;
@@ -138,7 +138,7 @@ class Compiler
         }
         $this->addFile($phar, new \SplFileInfo(__DIR__.'/../../vendor/composer/ClassLoader.php'));
 
-        $this->addFile($phar, new \SplFileInfo(__DIR__ . '/../../res/cacert.pem'), false);
+        $this->addFile($phar, new \SplFileInfo((getenv('BUILDROOT')?:'') . '/usr/share/composer/res/cacert.pem'), false);
 
         $this->addComposerBin($phar);
 
diff -up ./src/Composer/Json/JsonFile.php.rpm ./src/Composer/Json/JsonFile.php
--- ./src/Composer/Json/JsonFile.php.rpm	2016-04-18 22:14:28.000000000 +0200
+++ ./src/Composer/Json/JsonFile.php	2016-04-19 07:15:05.421424090 +0200
@@ -156,7 +156,7 @@ class JsonFile
             self::validateSyntax($content, $this->path);
         }
 
-        $schemaFile = __DIR__ . '/../../../res/composer-schema.json';
+        $schemaFile = (getenv('BUILDROOT')?:'') . '/usr/share/composer/res/composer-schema.json';
         $schemaData = json_decode(file_get_contents($schemaFile));
 
         if ($schema === self::LAX_SCHEMA) {
diff -up ./src/Composer/Util/RemoteFilesystem.php.rpm ./src/Composer/Util/RemoteFilesystem.php
--- ./src/Composer/Util/RemoteFilesystem.php.rpm	2016-04-18 22:14:28.000000000 +0200
+++ ./src/Composer/Util/RemoteFilesystem.php	2016-04-19 07:15:05.421424090 +0200
@@ -925,7 +925,7 @@ class RemoteFilesystem
             }
         }
 
-        return $caPath = __DIR__.'/../../../res/cacert.pem'; // Bundled with Composer, last resort
+        return $caPath = (getenv('BUILDROOT')?:'') . '/usr/share/composer/res/cacert.pem'; // Bundled with Composer, last resort
     }
 
     /**
diff -up ./tests/Composer/Test/Json/ComposerSchemaTest.php.rpm ./tests/Composer/Test/Json/ComposerSchemaTest.php
--- ./tests/Composer/Test/Json/ComposerSchemaTest.php.rpm	2016-04-19 07:15:19.122479957 +0200
+++ ./tests/Composer/Test/Json/ComposerSchemaTest.php	2016-04-19 07:15:45.229586410 +0200
@@ -87,7 +87,7 @@ class ComposerSchemaTest extends \PHPUni
 
     private function check($json)
     {
-        $schema = json_decode(file_get_contents(__DIR__ . '/../../../../res/composer-schema.json'));
+        $schema = json_decode(file_get_contents((getenv('BUILDROOT')?:'') . '/usr/share/composer/res/composer-schema.json'));
         $validator = new Validator();
         $validator->check(json_decode($json), $schema);