diff --git a/src/Composer/ArrayRepository.php b/src/Composer/ArrayRepository.php
deleted file mode 100644
index 300c1d2..0000000
--- a/src/Composer/ArrayRepository.php
+++ /dev/null
@@ -1,27 +0,0 @@
-<?php
-
-namespace Phabel\Composer;
-
-use Composer\Package\Link;
-use Composer\Package\Package;
-use Composer\Package\PackageInterface;
-use Composer\Repository\ComposerRepository;
-use Composer\Repository\RepositoryInterface;
-use Composer\Repository\ArrayRepository as ComposerArrayRepository;
-use Composer\Semver\Constraint\Constraint;
-use Composer\Semver\Constraint\ConstraintInterface;
-
-/**
- * @author Daniil Gentili <daniil@daniil.it>
- * @license MIT
- *
- * @property ComposerArrayRepository $repository
- */
-trait ArrayRepository
-{
-
-    public function addPackage(PackageInterface $package)
-    {
-        $this->repository->addPackage($package);
-    }
-}
\ No newline at end of file
diff --git a/src/Composer/Constraint/Constraint.php b/src/Composer/Constraint/Constraint.php
new file mode 100644
index 0000000..8b17efb
--- /dev/null
+++ b/src/Composer/Constraint/Constraint.php
@@ -0,0 +1,74 @@
+<?php
+
+namespace Phabel\Composer\Constraint;
+
+use Composer\Semver\Constraint\Constraint as ComposerConstraint;
+
+/**
+ * Constraint.
+ *
+ * @property ComposerConstraint $previous
+ */
+class Constraint extends ComposerConstraint
+{
+    use ConstraintTrait;
+
+
+    public function getVersion()
+    {
+        return $this->previous->getVersion();
+    }
+
+    public function getOperator()
+    {
+        return $this->previous->getOperator();
+    }
+
+    /**
+     * Get all supported comparison operators.
+     *
+     * @return array
+     */
+    public static function getSupportedOperators()
+    {
+        return ComposerConstraint::getSupportedOperators();
+    }
+
+    /**
+     * @param  string $operator
+     * @return int
+     *
+     * @phpstan-return self::OP_*
+     */
+    public static function getOperatorConstant($operator)
+    {
+        return ComposerConstraint::getOperatorConstant($operator);
+    }
+
+    /**
+     * @param string $a
+     * @param string $b
+     * @param string $operator
+     * @param bool   $compareBranches
+     *
+     * @throws \InvalidArgumentException if invalid operator is given.
+     *
+     * @return bool
+     */
+    public function versionCompare($a, $b, $operator, $compareBranches = false)
+    {
+        return $this->previous->versionCompare($a, $b, $operator, $compareBranches);
+    }
+
+
+    /**
+     * @param ComposerConstraint $provider
+     * @param bool       $compareBranches
+     *
+     * @return bool
+     */
+    public function matchSpecific(ComposerConstraint $provider, $compareBranches = false)
+    {
+        return $this->previous->matchSpecific($provider, $compareBranches);
+    }
+}
diff --git a/src/Composer/Constraint/ConstraintTrait.php b/src/Composer/Constraint/ConstraintTrait.php
new file mode 100644
index 0000000..481c279
--- /dev/null
+++ b/src/Composer/Constraint/ConstraintTrait.php
@@ -0,0 +1,119 @@
+<?php
+
+namespace Phabel\Composer\Constraint;
+
+use Composer\Semver\Constraint\ConstraintInterface;
+
+trait ConstraintTrait
+{
+    /**
+     * Constraint.
+     */
+    private ConstraintInterface $previous;
+    /**
+     * Config.
+     */
+    private array $config;
+    /**
+     * Constructs new constraint with phabel config.
+     *
+     * @param ConstraintInterface $previous
+     * @param array $config
+     */
+    public function __construct(ConstraintInterface $previous, array $config)
+    {
+        $this->previous = $previous;
+        $this->config = $config;
+    }
+
+    /**
+     * Checks whether the given constraint intersects in any way with this constraint.
+     *
+     * @param ConstraintInterface $provider
+     *
+     * @return bool
+     */
+    public function matches(ConstraintInterface $provider)
+    {
+        return $this->previous->matches($provider);
+    }
+
+    /**
+     * Provides a compiled version of the constraint for the given operator
+     * The compiled version must be a PHP expression.
+     * Executor of compile version must provide 2 variables:
+     * - $v = the string version to compare with
+     * - $b = whether or not the version is a non-comparable branch (starts with "dev-").
+     *
+     * @see Constraint::OP_* for the list of available operators.
+     * @example return '!$b && version_compare($v, '1.0', '>')';
+     *
+     * @param int $operator one Constraint::OP_*
+     *
+     * @return string
+     */
+    public function compile($operator)
+    {
+        return $this->previous->compile($operator);
+    }
+
+    /**
+     * @return Bound
+     */
+    public function getUpperBound()
+    {
+        return $this->previous->getUpperBound();
+    }
+
+    /**
+     * @return Bound
+     */
+    public function getLowerBound()
+    {
+        return $this->previous->getLowerBound();
+    }
+
+    /**
+     * @return string
+     */
+    public function getPrettyString()
+    {
+        return $this->previous->getPrettyString();
+    }
+
+    /**
+     * @param string|null $prettyString
+     */
+    public function setPrettyString($prettyString)
+    {
+        return $this->previous->setPrettyString($prettyString);
+    }
+
+    /**
+     * @return string
+     */
+    public function __toString()
+    {
+        return $this->previous->__toString();
+    }
+
+    /**
+     * Get config.
+     *
+     * @return array
+     */
+    public function getConfig(): array
+    {
+        return $this->config;
+    }
+
+    /**
+     * Get constraint.
+     *
+     * @return ConstraintInterface
+     */
+    public function getPrevious(): ConstraintInterface
+    {
+        return $this->previous;
+    }
+}
diff --git a/src/Composer/Constraint/MultiConstraint.php b/src/Composer/Constraint/MultiConstraint.php
new file mode 100644
index 0000000..8e392bc
--- /dev/null
+++ b/src/Composer/Constraint/MultiConstraint.php
@@ -0,0 +1,57 @@
+<?php
+
+namespace Phabel\Composer\Constraint;
+
+use Composer\Semver\Constraint\MultiConstraint as ComposerMultiConstraint;
+
+/**
+ * Constraint.
+ *
+ * @property ComposerMultiConstraint $previous
+ */
+class MultiConstraint extends ComposerMultiConstraint
+{
+    use ConstraintTrait;
+
+
+    /**
+     * @return ConstraintInterface[]
+     */
+    public function getConstraints()
+    {
+        return $this->previous->getConstraints();
+    }
+
+    /**
+     * @return bool
+     */
+    public function isConjunctive()
+    {
+        return $this->previous->isConjunctive();
+    }
+
+    /**
+     * @return bool
+     */
+    public function isDisjunctive()
+    {
+        return !$this->previous->isDisjunctive();
+    }
+
+
+    /**
+     * Tries to optimize the constraints as much as possible, meaning
+     * reducing/collapsing congruent constraints etc.
+     * Does not necessarily return a MultiConstraint instance if
+     * things can be reduced to a simple constraint
+     *
+     * @param ConstraintInterface[] $constraints A set of constraints
+     * @param bool                  $conjunctive Whether the constraints should be treated as conjunctive or disjunctive
+     *
+     * @return ConstraintInterface
+     */
+    public static function create(array $constraints, $conjunctive = true)
+    {
+        return ComposerMultiConstraint::create($conjunctive, $conjunctive);
+    }
+}
diff --git a/src/Composer/Plugin.php b/src/Composer/Plugin.php
index 4981c25..7fa6610 100644
--- a/src/Composer/Plugin.php
+++ b/src/Composer/Plugin.php
@@ -5,15 +5,17 @@ namespace Phabel\Composer;
 use Composer\Composer;
 use Composer\EventDispatcher\EventSubscriberInterface;
 use Composer\Installer\InstallerEvent;
-use Composer\Installer\InstallerEvents;
 use Composer\Installer\PackageEvent;
 use Composer\Installer\PackageEvents;
 use Composer\IO\IOInterface;
 use Composer\Plugin\PluginInterface;
 use Composer\Repository\ArrayRepository as ComposerArrayRepository;
-use Composer\Repository\ConfigurableRepository as ComposerConfigurableRepository;
 use Composer\Repository\ComposerRepository as ComposerComposerRepository;
-use Composer\Repository\RepositoryInterface;
+use Composer\Repository\ConfigurableRepository as ComposerConfigurableRepository;
+use Phabel\Composer\Repository\ArrayRepository;
+use Phabel\Composer\Repository\ComposerRepository;
+use Phabel\Composer\Repository\ConfigurableRepository;
+use Phabel\Composer\Repository\Repository;
 use ReflectionObject;
 
 /**
@@ -54,13 +56,13 @@ class Plugin implements PluginInterface, EventSubscriberInterface
                         $traits []= $trait;
                     }
                 }
-                sort($traits);
+                \sort($traits);
                 if ($traits === [ArrayRepository::class]) {
                     $repo = new class($repo) extends ComposerArrayRepository {
                         use Repository;
                         use ArrayRepository;
                     };
-                } else if ($traits === [ConfigurableRepository::class]) {
+                } elseif ($traits === [ConfigurableRepository::class]) {
                     $repo = new class($repo) extends ComposerRepository {
                         use Repository;
                         use ConfigurableRepository;
@@ -75,7 +77,7 @@ class Plugin implements PluginInterface, EventSubscriberInterface
             }
             $repoManager->prependRepository($repo);
         }
-        var_dump(array_map('get_class', $repoManager->getRepositories()));
+        \var_dump(\array_map('get_class', $repoManager->getRepositories()));
         $this->io = $io;
     }
 
diff --git a/src/Composer/Repository/ArrayRepository.php b/src/Composer/Repository/ArrayRepository.php
new file mode 100644
index 0000000..ee864d9
--- /dev/null
+++ b/src/Composer/Repository/ArrayRepository.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace Phabel\Composer\Repository;
+
+use Composer\Package\Link;
+use Composer\Package\Package;
+use Composer\Package\PackageInterface;
+use Composer\Repository\ComposerRepository;
+use Composer\Repository\RepositoryInterface;
+use Composer\Repository\ArrayRepository as ComposerArrayRepository;
+use Composer\Semver\Constraint\Constraint;
+use Composer\Semver\Constraint\ConstraintInterface;
+
+/**
+ * @author Daniil Gentili <daniil@daniil.it>
+ * @license MIT
+ *
+ * @property ComposerArrayRepository $repository
+ */
+trait ArrayRepository
+{
+    public function addPackage(PackageInterface $package)
+    {
+        $this->repository->addPackage($package);
+    }
+
+    public function getProviders($packageName)
+    {
+        return $this->repository->getProviders($packageName);
+    }
+    public function loadPackages(array $packageNameMap, array $acceptableStabilities, array $stabilityFlags, array $alreadyLoaded = array())
+    {
+        $packages = $this->repository->loadPackages($packageNameMap, $acceptableStabilities, $stabilityFlags, $alreadyLoaded);
+        foreach ($packages['packages'] as &$package) {
+            self::preparePackage($package, []);
+        }
+        return $packages;
+    }
+    public function getPackageNames($packageFilter = null)
+    {
+        return $this->getPackageNames($packageFilter);
+    }
+}
\ No newline at end of file
diff --git a/src/Composer/ComposerRepository.php b/src/Composer/Repository/ComposerRepository.php
similarity index 73%
rename from src/Composer/ComposerRepository.php
rename to src/Composer/Repository/ComposerRepository.php
index f988e24..ce7d8f9 100644
--- a/src/Composer/ComposerRepository.php
+++ b/src/Composer/Repository/ComposerRepository.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace Phabel\Composer;
+namespace Phabel\Composer\Repository;
 
 use Composer\DependencyResolver\Pool;
 use Composer\Package\PackageInterface;
@@ -30,6 +30,7 @@ class ComposerRepository extends ComposerComposerRepository
      * @param  bool        $bypassFilters If set to true, this bypasses the stability filtering, and forces a recompute without cache
      * @return array|mixed
      */
+    /*
     public function whatProvides(Pool $pool, $name, $bypassFilters = false)
     {
         $whatProvides = $this->reflect->getMethod('whatProvides')->invokeArgs($this->repository, [$pool, $name, $bypassFilters]);
@@ -48,7 +49,7 @@ class ComposerRepository extends ComposerComposerRepository
             }
         }
         return $whatProvides;
-    }
+    }*/
 
 
     public function getProviderNames()
@@ -64,4 +65,21 @@ class ComposerRepository extends ComposerComposerRepository
     {
         return $this->repository->resetPackageIds();
     }
+
+    public function createPackages(array $packages, $class = 'Composer\Package\CompletePackage')
+    {
+        return $this->repository->createPackages($packages, $class);
+    }
+
+    /**
+     * TODO v3 should make this private once we can drop PHP 5.3 support
+     *
+     * @param string $name package name (must be lowercased already)
+     * @private
+     */
+    public function isVersionAcceptable($constraint, $name, $versionData, array $acceptableStabilities = null, array $stabilityFlags = null)
+    {
+        self::prepareConstraint($constraint);
+        return $this->isVersionAcceptable($constraint, $name, $versionData, $acceptableStabilities, $stabilityFlags);
+    }
 }
diff --git a/src/Composer/ConfigurableRepository.php b/src/Composer/Repository/ConfigurableRepository.php
similarity index 94%
rename from src/Composer/ConfigurableRepository.php
rename to src/Composer/Repository/ConfigurableRepository.php
index 3a0150c..9f6d4db 100644
--- a/src/Composer/ConfigurableRepository.php
+++ b/src/Composer/Repository/ConfigurableRepository.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace Phabel\Composer;
+namespace Phabel\Composer\Repository;
 
 use Composer\Package\Link;
 use Composer\Package\Package;
diff --git a/src/Composer/Repository.php b/src/Composer/Repository/Repository.php
similarity index 72%
rename from src/Composer/Repository.php
rename to src/Composer/Repository/Repository.php
index 73f8229..cd7eb4c 100644
--- a/src/Composer/Repository.php
+++ b/src/Composer/Repository/Repository.php
@@ -1,13 +1,18 @@
 <?php
 
-namespace Phabel\Composer;
+namespace Phabel\Composer\Repository;
 
+use Composer\Package\AliasPackage;
 use Composer\Package\Link;
 use Composer\Package\Package;
 use Composer\Package\PackageInterface;
+use Composer\Repository\PlatformRepository;
 use Composer\Repository\RepositoryInterface;
-use Composer\Semver\Constraint\Constraint;
+use Composer\Semver\Constraint\Constraint as ConstraintConstraint;
 use Composer\Semver\Constraint\ConstraintInterface;
+use Composer\Semver\Constraint\MultiConstraint as ConstraintMultiConstraint;
+use Phabel\Composer\Constraint\Constraint;
+use Phabel\Composer\Constraint\MultiConstraint;
 use ReflectionObject;
 
 /**
@@ -21,7 +26,7 @@ trait Repository
      */
     protected RepositoryInterface $repository;
     /**
-     * Reflection object
+     * Reflection object.
      */
     protected ReflectionObject $reflect;
     /**
@@ -56,6 +61,12 @@ trait Repository
      */
     private static function prepareConstraint(&$constraint): array
     {
+        if ($constraint instanceof Constraint || $constraint instanceof MultiConstraint) {
+            $config = $constraint->getConfig();
+            $constraint = $constraint->getPrevious();
+            return $config;
+        }
+        /*
         if (!$constraint instanceof ConstraintInterface && !\is_string($constraint)) {
             return [];
         }
@@ -63,8 +74,8 @@ trait Repository
         if (!str_starts_with($constraint, ComposerRepository::CONFIG_PREFIX)) {
             return [];
         }
-        [$config, $constraint] = \explode("\n", $constraint, 2);
-        return \json_decode(\substr($config, 0, \strlen(ComposerRepository::CONFIG_PREFIX)), true) ?: [];
+        [$config, $constraint] = \explode("\0", $constraint, 2);
+        return \json_decode(\substr($config, 0, \strlen(ComposerRepository::CONFIG_PREFIX)), true) ?: [];*/
     }
     /**
      * Prepare package.
@@ -94,15 +105,30 @@ trait Repository
             }
         }
         if (!$havePhabel) {
-            return;
+            //return;
         }
         // Config merging logic here...
         $links = [];
         foreach ($package->getRequires() as $link) {
-            $version = ComposerRepository::CONFIG_PREFIX.\json_encode($config)."\n".($link->getConstraint() ?? '');
-            $links []= new Link($link->getSource(), $link->getTarget(), new Constraint('>=', $version), $link->getDescription());
+            if (PlatformRepository::isPlatformPackage($link->getTarget())) {
+                continue;
+            }
+            //var_dumP($link->getTarget(), (string) $link->getConstraint());
+            //$version = ComposerRepository::CONFIG_PREFIX.\json_encode($config)."\0".($link->getConstraint() ?? '');
+            $constraint = $link->getConstraint();
+            if ($constraint instanceof ConstraintMultiConstraint) {
+                $constraint = new MultiConstraint($constraint, $config);
+            } else {
+                $constraint = new Constraint($constraint, $config);
+            }
+            $links []= new Link($link->getSource(), $link->getTarget(), $constraint, $link->getDescription());
+        }
+        if ($package instanceof Package) {
+            $package->setRequires($links);
+        } elseif ($package instanceof AliasPackage) {
+            while (($p = $package->getAliasOf()) instanceof AliasPackage);
+            $p->setRequires($links);
         }
-        $package->setRequires($links);
     }
 
     /**
@@ -160,4 +186,9 @@ trait Repository
     {
         return $this->repository->search($query, $mode, $type);
     }
+
+    public function getRepoName()
+    {
+        return $this->repository->getRepoName();
+    }
 }