diff --git a/compiler/myocamlbuild.ml b/compiler/myocamlbuild.ml
index 3f220c3..99f9a6e 100644
--- a/compiler/myocamlbuild.ml
+++ b/compiler/myocamlbuild.ml
@@ -8,7 +8,7 @@ let df = function
       ocamlfind_after_rules ();
 
       (* Tell ocamlbuild about the camlp4 library. *)
-      ocaml_lib ~extern:true ~dir:"+camlp4" "camlp4";
+      ocaml_lib ~extern:true ~dir:(ocamlfind_query "camlp4") "camlp4";
 
       (* Add preproc.cmo to the ocaml pre-processor when use_preproc is set *)
       flag ["ocaml"; "pp"; "use_preproc"] (A "preproc.cmo");
diff --git a/compiler/myocamlbuild_config.ml b/compiler/myocamlbuild_config.ml
index a1a212b..56f83bb 100644
--- a/compiler/myocamlbuild_config.ml
+++ b/compiler/myocamlbuild_config.ml
@@ -32,6 +32,10 @@ let find_syntaxes () = ["camlp4o"; "camlp4r"]
 (* ocamlfind command *)
 let ocamlfind x = S[A"ocamlfind"; x]
 
+let ocamlfind_query pkg =
+  let cmd = Printf.sprintf "ocamlfind query %s" (Filename.quote pkg) in
+  Ocamlbuild_pack.My_unix.run_and_open cmd (fun ic -> input_line ic)
+
 let ocamlfind_before_options () =
        (* by using Before_options one let command line options have an higher priority *)
        (* on the contrary using After_options will guarantee to have the higher priority *)
diff --git a/config b/config
deleted file mode 100644
index dced476..0000000
--- a/config
+++ /dev/null
@@ -1,22 +0,0 @@
-srcdir      = .
-top_srcdir  = .
-prefix      = /opt/local
-exec_prefix = ${prefix}
-bindir      = ${exec_prefix}/bin
-libdir      = ${exec_prefix}/lib
-
-INSTALL= /usr/bin/install -c
-MAKE= @MAKE@
-
-BUILD= _build
-COMPILER=heptc
-SIMULATOR=hepts
-
-INSTALL_BINDIR=$(bindir)
-INSTALL_LIBDIR=$(libdir)/heptagon
-STDLIB_DIR=${exec_prefix}/lib/heptagon
-
-OCAMLBUILD=STDLIB=$(STDLIB_DIR) ocamlbuild
-
-TARGET=byte
-ENABLE_SIMULATOR=yes
diff --git a/configure b/configure
index b47f139..eaf25a7 100755
--- a/configure
+++ b/configure
@@ -2929,6 +2929,12 @@ echo "$as_me: error: Please install OCaml findlib (the ocamlfind command)" >&2;}
    { (exit 1); exit 1; }; }
 fi
 
+OCAMLC_STDLIB=`$OCAMLFIND ocamlc -where`
+OCAMLFIND_STDLIB=`$OCAMLFIND printconf stdlib`
+if test "$OCAMLC_STDLIB" != "$OCAMLFIND_STDLIB"; then
+  as_fn_error $? "OCaml and OCamlfind are installed in different directories" "$LINENO" 5
+fi
+
 # Extract the first word of "menhir", so it can be a program name with args.
 set dummy menhir; ac_word=$2
 { echo "$as_me:$LINENO: checking for $ac_word" >&5
@@ -3074,6 +3080,7 @@ fi
 
 
 
+
 ac_config_files="$ac_config_files config"
 
 cat >confcache <<\_ACEOF
diff --git a/configure.in b/configure.in
index 91f97da..031cdb2 100644
--- a/configure.in
+++ b/configure.in
@@ -25,6 +25,12 @@ if test "$OCAMLFIND" = "no"; then
   AC_MSG_ERROR([Please install OCaml findlib (the ocamlfind command)])
 fi
 
+OCAMLC_STDLIB=`$OCAMLFIND ocamlc -where`
+OCAMLFIND_STDLIB=`$OCAMLFIND printconf stdlib`
+if test "$OCAMLC_STDLIB" != "$OCAMLFIND_STDLIB"; then
+  AC_MSG_ERROR([OCaml and OCamlfind make different assumptions about the standard library directory])
+fi
+
 AC_CHECK_PROG(MENHIR,menhir,menhir,no)
 if test "$MENHIR" = no ; then
     AC_MSG_ERROR(Please install menhir.)
@@ -52,6 +58,7 @@ else
     stdlib_dir=$libdir/heptagon
 fi
 
+
 AC_SUBST(INSTALL)
 AC_SUBST(stdlib_dir)