1 files changed, 7 insertions, 10 deletions
diff --git a/pkgs/development/tools/ocaml/camlp4/default.nix b/pkgs/development/tools/ocaml/camlp4/default.nix
index ae253180aee1..145a3a2b54a9 100644
--- a/pkgs/development/tools/ocaml/camlp4/default.nix
+++ b/pkgs/development/tools/ocaml/camlp4/default.nix
@@ -1,14 +1,11 @@
 {stdenv, fetchzip, which, ocaml}:
-let
-  ocaml_version = (stdenv.lib.getVersion ocaml);
-  version = "4.02+6";
-
-in
 
-assert stdenv.lib.versionAtLeast ocaml_version "4.02";
+assert stdenv.lib.versionAtLeast ocaml.version "4.02";
 
-stdenv.mkDerivation {
+stdenv.mkDerivation rec {
   name = "camlp4-${version}";
+  version = "4.02+6";
+
   src = fetchzip {
     url = "https://github.com/ocaml/camlp4/archive/${version}.tar.gz";
     sha256 = "06yl4q0qazl7g25b0axd1gdkfd4qpqzs1gr5fkvmkrcbz113h1hj";
@@ -21,14 +18,14 @@ stdenv.mkDerivation {
   preConfigure = ''
     configureFlagsArray=(
       --bindir=$out/bin
-      --libdir=$out/lib/ocaml/${ocaml_version}/site-lib
-      --pkgdir=$out/lib/ocaml/${ocaml_version}/site-lib
+      --libdir=$out/lib/ocaml/${ocaml.version}/site-lib
+      --pkgdir=$out/lib/ocaml/${ocaml.version}/site-lib
     )
   '';
 
   postConfigure = ''
     substituteInPlace camlp4/META.in \
-    --replace +camlp4 $out/lib/ocaml/${ocaml_version}/site-lib/camlp4
+    --replace +camlp4 $out/lib/ocaml/${ocaml.version}/site-lib/camlp4
   '';