diff --git a/pkgs/applications/science/astronomy/gildas/default.nix b/pkgs/applications/science/astronomy/gildas/default.nix
index 968d8769caa3..a21c9f328f40 100644
--- a/pkgs/applications/science/astronomy/gildas/default.nix
+++ b/pkgs/applications/science/astronomy/gildas/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, gtk2-x11 , pkgconfig , python27 , gfortran , lesstif
-, cfitsio , getopt , perl , groff , which
+, cfitsio , getopt , perl , groff , which, darwin
 }:
 
 let
@@ -7,8 +7,8 @@ let
 in
 
 stdenv.mkDerivation rec {
-  srcVersion = "jul19a";
-  version = "20190701_a";
+  srcVersion = "sep19a";
+  version = "20190901_a";
   pname = "gildas";
 
   src = fetchurl {
@@ -16,19 +16,22 @@ stdenv.mkDerivation rec {
     # source code of the previous release to a different directory
     urls = [ "http://www.iram.fr/~gildas/dist/gildas-src-${srcVersion}.tar.xz"
       "http://www.iram.fr/~gildas/dist/archive/gildas/gildas-src-${srcVersion}.tar.xz" ];
-    sha256 = "97eaa0d0a0f53f0616462642a9bfaddb0305a8a0948e60531d8a524a13a370b6";
+    sha256 = "0l4jfzzxp1ab70a920qfbxiphgnc06m46wfwv0jlsq2mfk7cxac1";
   };
 
   enableParallelBuilding = true;
 
   nativeBuildInputs = [ pkgconfig groff perl getopt gfortran which ];
 
-  buildInputs = [ gtk2-x11 lesstif cfitsio python27Env ];
+  buildInputs = [ gtk2-x11 lesstif cfitsio python27Env ]
+    ++ stdenv.lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ CoreFoundation ]);
 
   patches = [ ./wrapper.patch ./clang.patch ./aarch64.patch ];
 
   NIX_CFLAGS_COMPILE = stdenv.lib.optionalString stdenv.cc.isClang "-Wno-unused-command-line-argument";
 
+  NIX_LDFLAGS = stdenv.lib.optionalString stdenv.isDarwin (with darwin.apple_sdk.frameworks; "-F${CoreFoundation}/Library/Frameworks");
+
   configurePhase=''
     substituteInPlace admin/wrapper.sh --replace '%%OUT%%' $out
     substituteInPlace admin/wrapper.sh --replace '%%PYTHONHOME%%' ${python27Env}