1 files changed, 7 insertions, 8 deletions
diff --git a/pkgs/development/ocaml-modules/ocaml-cairo/default.nix b/pkgs/development/ocaml-modules/ocaml-cairo/default.nix
index 8ee51ed311fe..80ae140a3fc4 100644
--- a/pkgs/development/ocaml-modules/ocaml-cairo/default.nix
+++ b/pkgs/development/ocaml-modules/ocaml-cairo/default.nix
@@ -1,13 +1,12 @@
 {stdenv, fetchurl, automake, ocaml, autoconf, gnum4, pkgconfig, freetype, lablgtk, unzip, cairo, findlib, gdk_pixbuf, glib, gtk2, pango }:
 
 let
-  ocaml_version = (builtins.parseDrvName ocaml.name).version;
   pname = "ocaml-cairo";
-  version = "1.2.0";
 in
 
-stdenv.mkDerivation {
+stdenv.mkDerivation rec {
   name = "${pname}-${version}";
+  version = "1.2.0";
 
   src = fetchurl {
     url = "http://cgit.freedesktop.org/cairo-ocaml/snapshot/cairo-ocaml-${version}.zip";
@@ -25,16 +24,16 @@ stdenv.mkDerivation {
    aclocal -I support
    autoconf
    export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE `pkg-config --cflags cairo gdk-pixbuf glib gtk+ pango`"
-   export LABLGTKDIR=${lablgtk}/lib/ocaml/${ocaml_version}/site-lib/lablgtk2
-   cp ${lablgtk}/lib/ocaml/${ocaml_version}/site-lib/lablgtk2/pango.ml ./src
-   cp ${lablgtk}/lib/ocaml/${ocaml_version}/site-lib/lablgtk2/gaux.ml ./src
+   export LABLGTKDIR=${lablgtk}/lib/ocaml/${ocaml.version}/site-lib/lablgtk2
+   cp ${lablgtk}/lib/ocaml/${ocaml.version}/site-lib/lablgtk2/pango.ml ./src
+   cp ${lablgtk}/lib/ocaml/${ocaml.version}/site-lib/lablgtk2/gaux.ml ./src
   '';
 
   postInstall = ''
-    cp META $out/lib/ocaml/${ocaml_version}/site-lib/cairo/
+    cp META $out/lib/ocaml/${ocaml.version}/site-lib/cairo/
   '';
 
-  makeFlags = "INSTALLDIR=$(out)/lib/ocaml/${ocaml_version}/site-lib/cairo";
+  makeFlags = "INSTALLDIR=$(out)/lib/ocaml/${ocaml.version}/site-lib/cairo";
 
   meta = {
     homepage = http://cairographics.org/cairo-ocaml;