1 files changed, 7 insertions, 0 deletions
diff --git a/pkgs/applications/science/math/sage/sage-src.nix b/pkgs/applications/science/math/sage/sage-src.nix
index dc8ba48e45e..4530cbf69f4 100644
--- a/pkgs/applications/science/math/sage/sage-src.nix
+++ b/pkgs/applications/science/math/sage/sage-src.nix
@@ -118,6 +118,13 @@ stdenv.mkDerivation rec {
       url = "https://git.sagemath.org/sage.git/patch?id=fcc11d6effa39f375bc5f4ea5831fb7a2f2767da";
       sha256 = "0hnmc8ld3bblks0hcjvjjaydkgwdr1cs3dbl2ys4gfq964pjgqwc";
     })
+
+    # https://trac.sagemath.org/ticket/28911
+    (fetchpatch {
+      name = "sympy-1.5.patch";
+      url = "https://git.sagemath.org/sage.git/patch/?h=c6d0308db15efd611211d26cfcbefbd180fc0831";
+      sha256 = "0nwai2jr22h49km4hx3kwafs3mzsc5kwsv7mqwjf6ibwfx2bbgyq";
+    })
   ];
 
   patches = nixPatches ++ bugfixPatches ++ packageUpgradePatches;