diff --git a/build.wake b/build.wake
index eaf61865e0e..bc2c874d05a 100644
--- a/build.wake
+++ b/build.wake
@@ -144,8 +144,8 @@ global def runRocketChipGenerator options =
   def filterFiles regex = filter (matches regex _.getPathName) allOutputs
   def getFile regex = filterFiles regex | head | getOrElse (makeBadPath (makeError "File not found"))
   def getFileOpt regex = match (filterFiles regex)
-    Nil        = None
-    head, tail = Some head
+    Nil     = None
+    head, _ = Some head
 
   def allOutputs = generatorJob.getJobOutputs
   def baseFileName = match options.getRocketChipGeneratorOptionsBaseFileName
diff --git a/ci-tests/wake_scala_compilation b/ci-tests/wake_scala_compilation
index fb50fd999c0..f1d80f61756 100755
--- a/ci-tests/wake_scala_compilation
+++ b/ci-tests/wake_scala_compilation
@@ -3,8 +3,8 @@ set -ex
 
 echo "Installing Wake"
 
-wget https://github.com/sifive/wake/releases/download/v0.18.1/ubuntu-16-04-wake_0.18.1-1_amd64.deb
-sudo dpkg -i ubuntu-16-04-wake_0.18.1-1_amd64.deb
+wget https://github.com/sifive/wake/releases/download/v0.19.0/ubuntu-16-04-wake_0.19.0-1_amd64.deb
+sudo dpkg -i ubuntu-16-04-wake_0.19.0-1_amd64.deb
 
 
 echo "Installing Protobuf"
diff --git a/wit-manifest.json b/wit-manifest.json
index 8c30ce8dcfa..7e14634de68 100644
--- a/wit-manifest.json
+++ b/wit-manifest.json
@@ -30,7 +30,7 @@
         "source": "git@github.com:chipsalliance/api-config-chipsalliance.git"
     },
     {
-        "commit": "771f11581b86079bf3411f85ce77495e7444c08e",
+        "commit": "e5d463cd9d131033396a9d8921440abb55f114cd",
         "name": "api-scala-sifive",
         "source": "git@github.com:sifive/api-scala-sifive.git"
     }