diff --git a/src/Application.php b/src/Application.php
index 87ebb5a..ae7de29 100644
--- a/src/Application.php
+++ b/src/Application.php
@@ -53,6 +53,10 @@ protected function getDefaultInputDefinition() {
    */
   public function doRun(InputInterface $input, OutputInterface $output) {
     $workingDir = $input->getParameterOption(array('--cwd'));
+    if (empty($workingDir) && getenv('LOCO_PRJ')) {
+      $workingDir = getenv('LOCO_PRJ');
+    }
+
     if (FALSE !== $workingDir && '' !== $workingDir) {
       if (!is_dir($workingDir)) {
         throw new \RuntimeException("Invalid working directory specified, $workingDir does not exist.");
diff --git a/src/Command/LocoCommandTrait.php b/src/Command/LocoCommandTrait.php
index df9de90..0453b08 100644
--- a/src/Command/LocoCommandTrait.php
+++ b/src/Command/LocoCommandTrait.php
@@ -4,6 +4,7 @@
 use Loco\Loco;
 use Loco\LocoSystem;
 use Loco\LocoVolume;
+use Loco\Utils\File;
 use Loco\Utils\Shell;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Input\InputOption;
@@ -47,7 +48,10 @@ public function initSystem(InputInterface $input, OutputInterface $output) {
   }
 
   public function pickConfig() {
-    $c = Loco::filter('loco.config.find', ['file' => NULL]);
+    // If you setup an environment with a specific config file (`loco env -c FILE` or `loco shell -c FILE`), then
+    // the same file should be used in subsequent sub commands (`loco run SVC`).
+    $envFile = getenv('LOCO_CFG_YML') ? File::toAbsolutePath(getenv('LOCO_CFG_YML')) : NULL;
+    $c = Loco::filter('loco.config.find', ['file' => $envFile]);
     if ($c['file']) {
       return $c['file'];
     }