Update packages/strymonas-pure/strymonas-pure.2.1.1/opam

Co-authored-by: Raphaël Proust <[email protected]>

Author: moatom

packages/strymonas-pure/strymonas-pure.2.1.1/opam

@@ -18,7 +18,7 @@ depends: [
   "ocamlfind" {build}
 ]
 build: [
-  [make "pure"]
+  [make "-C" "lib/" "pure"]
 ]
 install:[make "install-pure"]
 remove:[make "uninstall-pure"]