Merge pull request #3836 from BuckleScript/tweak_buildocaml

tweak changes to buildocaml.js to make esy patch obvious

Author: bobzhang

scripts/buildocaml.js

@@ -56,21 +56,20 @@ exports.getVersionPrefix = getVersionPrefix;
 function build(config) {
   ensureOCamlExistsSync();
 
-  var prefix =
-    process.env.ESY === "true"
-      ? process.env.cur__install
-      : path.normalize(
-          path.join(__dirname, "..", "native", getVersionPrefix())
-        );
-  if (config && process.env.ESY !== "true") {
-    cp.execSync(
-      "./configure -prefix " +
-        prefix +
-        " -no-ocamlbuild  -no-curses -no-graph -no-pthread -no-debugger && make clean",
-      { cwd: ocamlSrcDir, stdio: [0, 1, 2] }
-    );
-  }
   if (process.env.ESY !== "true") {
+    var prefix = path.normalize(
+      path.join(__dirname, "..", "native", getVersionPrefix())
+    );
+
+    if (config) {
+      cp.execSync(
+        "./configure -prefix " +
+          prefix +
+          " -no-ocamlbuild  -no-curses -no-graph -no-pthread -no-debugger && make clean",
+        { cwd: ocamlSrcDir, stdio: [0, 1, 2] }
+      );
+    }
+
     cp.execSync("make -j9 world.opt && make install ", {
       cwd: ocamlSrcDir,
       stdio: [0, 1, 2]