diff --git a/build.sbt b/build.sbt
index be942a390..b39bc29eb 100644
--- a/build.sbt
+++ b/build.sbt
@@ -6,7 +6,7 @@ import Dependencies._
 inThisBuild(
   List(
     organization := "ch.epfl.scala",
-    version := customScalafixVersion.getOrElse(version.value)
+    version := customScalafixVersion.getOrElse(version.value.replace('+', '-'))
   )
 )
 name := {
@@ -33,9 +33,26 @@ commands += Command.command("ci-slow") { s =>
     s
 }
 
+lazy val adhocRepoUri = sys.props("scalafix.repository.uri")
+lazy val adhocRepoCredentials = sys.props("scalafix.repository.credentials")
+lazy val isCustomRepository = adhocRepoUri != null && adhocRepoCredentials != null
+
 lazy val publishSettings = Seq(
-  publishTo := Some(
-    "releases" at "https://oss.sonatype.org/service/local/staging/deploy/maven2"),
+  publishTo := {
+    if (isCustomRepository) Some("adhoc" at adhocRepoUri)
+    else {
+      val uri = "https://oss.sonatype.org/service/local/staging/deploy/maven2"
+      Some("Releases" at uri)
+    }
+  },
+  credentials ++= {
+    val credentialsFile = {
+      if (adhocRepoCredentials != null) new File(adhocRepoCredentials)
+      else null
+    }
+    if (credentialsFile != null) List(new FileCredentials(credentialsFile))
+    else Nil
+  },
   publishArtifact in Test := false,
   licenses := Seq(
     "Apache-2.0" -> url("http://www.apache.org/licenses/LICENSE-2.0")),
diff --git a/scalafix-core/shared/src/main/scala/scalafix/rule/Rule.scala b/scalafix-core/shared/src/main/scala/scalafix/rule/Rule.scala
index 144f52a01..c62b7f4c8 100644
--- a/scalafix-core/shared/src/main/scala/scalafix/rule/Rule.scala
+++ b/scalafix-core/shared/src/main/scala/scalafix/rule/Rule.scala
@@ -186,13 +186,13 @@ object Rule {
 
   /** Combine two rules into a single rule */
   def merge(a: Rule, b: Rule): Rule = (a, b) match {
-    case (c1: CompositeRule, c2: CompositeRule) =>
-      new CompositeRule(c1.rules ::: c2.rules)
-    case (c1: CompositeRule, _) =>
-      new CompositeRule(b :: c1.rules)
-    case (_, c2: CompositeRule) =>
-      new CompositeRule(b :: c2.rules)
-    case (_, _) =>
+    case (ac: CompositeRule, bc: CompositeRule) =>
+      new CompositeRule(ac.rules ::: bc.rules)
+    case (ac: CompositeRule, b) =>
+      new CompositeRule(b :: ac.rules)
+    case (a, bc: CompositeRule) =>
+      new CompositeRule(a :: bc.rules)
+    case (a, b) =>
       new CompositeRule(a :: b :: Nil)
   }
 }