1 files changed, 43 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/python-modules/sympy/default.nix b/nixpkgs/pkgs/development/python-modules/sympy/default.nix
new file mode 100644
index 000000000000..c09267662c17
--- /dev/null
+++ b/nixpkgs/pkgs/development/python-modules/sympy/default.nix
@@ -0,0 +1,43 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, fetchpatch
+, glibcLocales
+, mpmath
+}:
+
+buildPythonPackage rec {
+  pname = "sympy";
+  version = "1.4"; # Upgrades may break sage. Please test or ping @timokau.
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1q937csy8rd18pk2fz1ssj7jyj7l3rjx4nzbiz5vcymfhrb1x8bi";
+  };
+
+  checkInputs = [ glibcLocales ];
+
+  propagatedBuildInputs = [ mpmath ];
+
+  # tests take ~1h
+  doCheck = false;
+
+  patches = [
+    # to be fixed by https://github.com/sympy/sympy/pull/13476
+    (fetchpatch {
+      url = "https://git.sagemath.org/sage.git/plain/build/pkgs/sympy/patches/03_undeffun_sage.patch?id=3277ba76d0ba7174608a31a0c6623e9210c63e3d";
+      sha256 = "0xcp1qafvqnivvvi0byh51mbgqicjhmswwvqvamjz9rxfzm5f7d7";
+    })
+  ];
+
+  preCheck = ''
+    export LANG="en_US.UTF-8"
+  '';
+
+  meta = {
+    description = "A Python library for symbolic mathematics";
+    homepage    = http://www.sympy.org/;
+    license     = lib.licenses.bsd3;
+    maintainers = with lib.maintainers; [ lovek323 timokau ];
+  };
+}