diff --git a/build.sbt b/build.sbt
index ab69a90fc..28403cc94 100644
--- a/build.sbt
+++ b/build.sbt
@@ -31,12 +31,12 @@ lazy val releaseSettings = Seq(
     else
       Some("releases"  at nexus + "service/local/staging/deploy/maven2")
   },
-  credentials += {
+  credentials ++= {
     Seq("SONATYPE_USER", "SONATYPE_PASS").map(sys.env.get) match {
       case Seq(Some(user), Some(pass)) =>
-        Credentials("Sonatype Nexus Repository Manager", "oss.sonatype.org", user, pass)
+        Seq(Credentials("Sonatype Nexus Repository Manager", "oss.sonatype.org", user, pass))
       case _ =>
-        Credentials(Path.userHome / ".ivy2" / ".credentials")
+        Seq()
     }
   }
 )