diff --git a/lang b/lang
index 81e008c..4bd523d 100755
--- a/lang
+++ b/lang
@@ -1,4 +1,4 @@
-#! /usr/bin/env sh
+#! /usr/bin/env bash
 
 # Usage:
 #
@@ -47,7 +47,6 @@ else
   extrem=$dynamic
 fi
 shift
-parsers=$@ # the names of the parsers
 
 # ################################################ #
 #          Clone and Build tree-sitter             #
@@ -75,13 +74,16 @@ then
   wget "https://github.com/tree-sitter/tree-sitter/releases/download/v$tstag/$gz"
   gunzip "$gz"
   chmod +x "$cli"
+  cli="../$cli"
+else
+  cli="tree-sitter"
 fi
 
 # ################################################ #
 #     Clone then Build Languages passed in args    #
 # ################################################ #
 
-for lang in "$parsers"
+for lang in "$@"
 do
 
   GET=tree-sitter-$lang
@@ -98,23 +100,23 @@ do
   then
     echo "> $lang: cloning"
     git clone https://github.com/tree-sitter/$GET
-    cd $GET
-    # Checkout the fixed ref.
-    checkout=$(cat ref | grep "^$lang:" | cut -d ':' -f 2)
-    if [ -z "$checkout" ]
-    then
-      echo "> $lang: using HEAD. Are you sure?"
-    else
-      echo "> $lang: checking out $checkout"
-      git checkout "$checkout"
-    fi
-    cd ..
   fi
 
+  # Checkout the fixed ref.
+  checkout=$(cat $PWD/ref | grep "^$lang:" | cut -d ':' -f 2)
+  cd $GET
+  if [ -z "$checkout" ]
+  then
+    echo "> $lang: using HEAD. Are you sure?"
+  else
+    echo "> $lang: checking out $checkout"
+    git checkout "$checkout"
+  fi
+  cd ..
   # Regenerate. See https://github.com/tree-sitter/tree-sitter/issues/2731
   cd $GET
   echo "> $lang: regenerating"
-  ../$cli generate --
+  $cli generate --
   # clean
   echo "> $lang: cleaning"
   cd src
@@ -125,7 +127,7 @@ do
   cd -
 
   echo "> $lang: compiling"
-  ../$cli build --output $OUT
+  $cli build --output $OUT
 
   echo "> $lang: done"
 done
diff --git a/ref b/ref
index e5b20a2..62ae3b5 100644
--- a/ref
+++ b/ref
@@ -2,9 +2,9 @@ bash:7331995b19b8f8aba2d5e26deb51d2195c18bc94
 c:212a80f86452bb1316324fa0db730cf52f29e05a
 embedded-template:203f7bd3c1bbfbd98fc19add4b8fcb213c059205
 html:949b78051835564bca937565241e5e337d838502
-java:2b57cd9541f9fd3a89207d054ce8fbe72657c444
-javascript:098bd31b7f838a31cce08db4091e989ea42f3ef6
+java:953abfc8bb3eb2f578e1f461edba4a9885f974b8
+javascript:4928d3d18019a848906855476fde2dc8be030217
 json:3fef30de8aee74600f25ec2e319b62a1a870d51e
 python:82f5c9937fe4300b4bec3ee0e788d642c77aab2c
-ruby:7a010836b74351855148818d5cb8170dc4df8e6a
-rust:79456e6080f50fc1ca7c21845794308fa5d35a51
+ruby:788a63ca1b7619288980aaafd37d890ee2469421
+rust:9c84af007b0f144954adb26b3f336495cbb320a7