diff --git a/scripts/_common.sh b/scripts/_common.sh
index fb75318..912324a 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -12,7 +12,8 @@ YNH_COMPOSER_VERSION="1.10.17"
 
 _ynh_exec_with_drush_php() {
     ynh_exec_warn_less ynh_exec_as "$app" \
-        env PATH="$PATH" DRUSH_PHP="/usr/bin/php$phpversion" \
+        env PATH="$install_dir/.composer/vendor/bin:$PATH" \
+        DRUSH_PHP="/usr/bin/php$phpversion" \
         "$@"
 }
 
diff --git a/scripts/install b/scripts/install
index f1fa499..c17edcc 100644
--- a/scripts/install
+++ b/scripts/install
@@ -57,8 +57,6 @@ ynh_add_config --template="composer.json" --destination="$install_dir/.composer/
 
 ynh_install_composer --phpversion="$phpversion" --workdir="$install_dir/.composer"
 
-export PATH="$install_dir/.composer/vendor/bin:$PATH"
-
 #=================================================
 # ADD A CONFIGURATION
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index a1faeec..7e8df4d 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -33,8 +33,6 @@ ynh_script_progression --message="Upgrading Composer..." --weight=3
 
 ynh_install_composer --phpversion="$phpversion" --workdir="$install_dir/.composer"
 
-export PATH="$install_dir/.composer/vendor/bin:$PATH"
-
 #=================================================
 # UPGRADE DRUPAL
 #=================================================