From 22d5fde0eed2605fd7a50a66b0da87b42f6b1b83 Mon Sep 17 00:00:00 2001
From: hqurve <hqurve@outlook.com>
Date: Thu, 17 Feb 2022 10:05:04 -0400
Subject: [PATCH] octavePackages.symbolic: 2.9.0 -> unstable-2021-10-16

Fixes https://github.com/NixOS/nixpkgs/issues/160381

https://github.com/cbm755/octsympy/issues/1023 previously prevented us
from using sympy 1.6+.
This issue has since been resolved however, no new tag nor release has
been made.
---
 .../octave-modules/symbolic/default.nix       | 33 +++++++------------
 1 file changed, 11 insertions(+), 22 deletions(-)

diff --git a/pkgs/development/octave-modules/symbolic/default.nix b/pkgs/development/octave-modules/symbolic/default.nix
index e40d27e7c385..513826539929 100644
--- a/pkgs/development/octave-modules/symbolic/default.nix
+++ b/pkgs/development/octave-modules/symbolic/default.nix
@@ -1,38 +1,27 @@
 { buildOctavePackage
 , lib
-, fetchurl
+, fetchFromGitHub
 # Octave's Python (Python 3)
 , python
-# Needed only to get the correct version of sympy needed
-, python2Packages
 }:
 
 let
-  # Need to use sympy 1.5.1 for https://github.com/cbm755/octsympy/issues/1023
-  # It has been addressed, but not merged yet.
-  # In the meantime, we create a Python environment with Python 3, its mpmath
-  # version and sympy 1.5 from python2Packages.
-  pythonEnv = (let
-      overridenPython = let
-        packageOverrides = self: super: {
-          sympy = super.sympy.overridePythonAttrs (old: rec {
-            version = python2Packages.sympy.version;
-            src = python2Packages.sympy.src;
-          });
-        };
-      in python.override {inherit packageOverrides; self = overridenPython; };
-    in overridenPython.withPackages (ps: [
+  pythonEnv = python.withPackages (ps: [
       ps.sympy
       ps.mpmath
-    ]));
+    ]);
 
 in buildOctavePackage rec {
   pname = "symbolic";
-  version = "2.9.0";
+  version = "unstable-2021-10-16";
 
-  src = fetchurl {
-    url = "mirror://sourceforge/octave/${pname}-${version}.tar.gz";
-    sha256 = "1jr3kg9q6r4r4h3hiwq9fli6wsns73rqfzkrg25plha9195c97h8";
+  # https://github.com/cbm755/octsympy/issues/1023 has been resolved, however
+  # a new release has not been made
+  src = fetchFromGitHub {
+    owner = "cbm755";
+    repo = "octsympy";
+    rev = "5b58530f4ada78c759829ae703a0e5d9832c32d4";
+    sha256 = "sha256-n6P1Swjl4RfgxfLY0ZuN3pcL8PcoknA6yxbnw96OZ2k=";
   };
 
   propagatedBuildInputs = [ pythonEnv ];