diff --git a/src/api/config/initializers/assets.rb b/src/api/config/initializers/assets.rb
index 7a22c59b0006..d84837a0be69 100644
--- a/src/api/config/initializers/assets.rb
+++ b/src/api/config/initializers/assets.rb
@@ -9,3 +9,8 @@
 # Precompile additional assets.
 # application.js, application.css, and all non-JS/CSS in app/assets folder are already added.
 Rails.application.config.assets.precompile += ['webui2/webui2.css', 'webui2/application.js', 'webui/obs_factory/application.css', 'webui2/cm2/*.js']
+
+# FIXME: concurrency are raising failure during the precompile.
+# For more information https://github.com/rails/sprockets/issues/581
+# and https://github.com/sass/sassc-ruby/pull/138
+Rails.application.config.assets.export_concurrent = false