From e46f7b3ec86dbfd1d51842c7f049283b0f2a22b8 Mon Sep 17 00:00:00 2001
From: Peder Bergebakken Sundt <pbsds@hotmail.com>
Date: Sun, 2 Mar 2025 21:37:54 +0100
Subject: [PATCH 1/2] curv: 0.5-unstable-2025-01-06 -> 0.5-unstable-2025-01-20

---
 pkgs/by-name/cu/curv/package.nix | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/pkgs/by-name/cu/curv/package.nix b/pkgs/by-name/cu/curv/package.nix
index ae6d0b8f3ac7..bb1d3bc3ca4e 100644
--- a/pkgs/by-name/cu/curv/package.nix
+++ b/pkgs/by-name/cu/curv/package.nix
@@ -15,18 +15,19 @@
   xorg,
   ilmbase,
   llvmPackages,
+  unstableGitUpdater,
 }:
 
 stdenv.mkDerivation rec {
   pname = "curv";
-  version = "0.5-unstable-2025-01-06";
+  version = "0.5-unstable-2025-01-20";
 
   src = fetchFromGitea {
     domain = "codeberg.org";
     owner = "doug-moen";
     repo = "curv";
-    rev = "a496d98459b65d15feae8e69036944dafb7ec26e";
-    hash = "sha256-2pe76fBU78xRvHxol8O1xv0bBVwbpKDVPLQqqUCTO0Y=";
+    rev = "ef082c6612407dd8abce06015f9a16b1ebf661b8";
+    hash = "sha256-BGL07ZBA+ao3fg3qp56sVTe+3tM2SOp8TGu/jF7SVlM=";
     fetchSubmodules = true;
   };
 
@@ -70,6 +71,8 @@ stdenv.mkDerivation rec {
     runHook postInstallCheck
   '';
 
+  passthru.updateScript = unstableGitUpdater { };
+
   meta = with lib; {
     description = "2D and 3D geometric modelling programming language for creating art with maths";
     homepage = "https://codeberg.org/doug-moen/curv";

From a3148686626e3fd81c1e4854e8ea4e891a9cf9ed Mon Sep 17 00:00:00 2001
From: Peder Bergebakken Sundt <pbsds@hotmail.com>
Date: Sun, 2 Mar 2025 22:07:57 +0100
Subject: [PATCH 2/2] curv: downgrade eigen

---
 pkgs/by-name/cu/curv/package.nix | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/pkgs/by-name/cu/curv/package.nix b/pkgs/by-name/cu/curv/package.nix
index bb1d3bc3ca4e..c32254a94890 100644
--- a/pkgs/by-name/cu/curv/package.nix
+++ b/pkgs/by-name/cu/curv/package.nix
@@ -2,6 +2,8 @@
   lib,
   stdenv,
   fetchFromGitea,
+  fetchFromGitLab,
+  fetchpatch,
   cmake,
   git,
   pkg-config,
@@ -41,7 +43,33 @@ stdenv.mkDerivation rec {
   buildInputs =
     [
       boost
-      eigen
+      # https://codeberg.org/doug-moen/curv/issues/228
+      # reverts 'eigen: 3.4.0 -> 3.4.0-unstable-2022-05-19'
+      # https://github.com/nixos/nixpkgs/commit/d298f046edabc84b56bd788e11eaf7ed72f8171c
+      (eigen.overrideAttrs (old: rec {
+        version = "3.4.0";
+        src = fetchFromGitLab {
+          owner = "libeigen";
+          repo = "eigen";
+          rev = version;
+          hash = "sha256-1/4xMetKMDOgZgzz3WMxfHUEpmdAm52RqZvz6i0mLEw=";
+        };
+        patches = (old.patches or [ ]) ++ [
+          # Fixes e.g. onnxruntime on aarch64-darwin:
+          # https://hydra.nixos.org/build/248915128/nixlog/1,
+          # originally suggested in https://github.com/NixOS/nixpkgs/pull/258392.
+          #
+          # The patch is from
+          # ["Fix vectorized reductions for Eigen::half"](https://gitlab.com/libeigen/eigen/-/merge_requests/699)
+          # which is two years old,
+          # but Eigen hasn't had a release in two years either:
+          # https://gitlab.com/libeigen/eigen/-/issues/2699.
+          (fetchpatch {
+            url = "https://gitlab.com/libeigen/eigen/-/commit/d0e3791b1a0e2db9edd5f1d1befdb2ac5a40efe0.patch";
+            hash = "sha256-8qiNpuYehnoiGiqy0c3Mcb45pwrmc6W4rzCxoLDSvj0=";
+          })
+        ];
+      }))
       glm
       libGL
       libpng