From 25fb57e937e54849721d8bc3b8b89cfa08346078 Mon Sep 17 00:00:00 2001
From: Anton Tayanovskyy <anton.tayanovskyy@gmail.com>
Date: Sat, 11 Jul 2026 19:52:32 -0400
Subject: [PATCH 1/2] sage: disable ntl threading on all platforms

Configure ntl dependency with NTL_THREADS=off, following how official sage builds configure it:

https://github.com/sagemath/sage/blob/80e56eaeb7089cfc5e4e0cc495ba8da43ee0a573/build/pkgs/ntl/spkg-install.in#L102
---
 pkgs/by-name/sa/sage/package.nix | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/pkgs/by-name/sa/sage/package.nix b/pkgs/by-name/sa/sage/package.nix
index bc4223cea5af..44300857e8de 100644
--- a/pkgs/by-name/sa/sage/package.nix
+++ b/pkgs/by-name/sa/sage/package.nix
@@ -12,12 +12,19 @@
 let
   inherit (pkgs) symlinkJoin callPackage mathjax;
 
+  ntl = pkgs.ntl.overrideAttrs (old: {
+    configureFlags = (old.configureFlags or [ ]) ++ [
+      "NTL_THREADS=off"
+    ];
+  });
+
   python3 = pkgs.python3 // {
     pkgs = pkgs.python3.pkgs.overrideScope (
       self: super: {
         # `sagelib`, i.e. all of sage except some wrappers and runtime dependencies
         sagelib = self.callPackage ./sagelib.nix {
           inherit flint;
+          inherit ntl;
           inherit sage-src env-locations singular;
           inherit (maxima) lisp-compiler;
           linbox = pkgs.linbox;
@@ -80,6 +87,7 @@ let
       singular
       palp
       flint
+      ntl
       pythonEnv
       maxima
       ;
@@ -94,6 +102,7 @@ let
   # sagelib with added wrappers and a dependency on sage-tests to make sure thet tests were run.
   sage-with-env = callPackage ./sage-with-env.nix {
     inherit python3 pythonEnv;
+    inherit ntl;
     inherit sage-env;
     inherit singular maxima;
     inherit three;

From 8a9d8cf6d0072dbd57ccf99785645fd3f5b44aa7 Mon Sep 17 00:00:00 2001
From: Anton Tayanovskyy <anton.tayanovskyy@gmail.com>
Date: Fri, 17 Jul 2026 21:42:04 -0400
Subject: [PATCH 2/2] sage: scope the ntl threads disablement to darwin

---
 pkgs/by-name/sa/sage/package.nix | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/pkgs/by-name/sa/sage/package.nix b/pkgs/by-name/sa/sage/package.nix
index 44300857e8de..54d5323a1712 100644
--- a/pkgs/by-name/sa/sage/package.nix
+++ b/pkgs/by-name/sa/sage/package.nix
@@ -1,5 +1,6 @@
 {
   pkgs,
+  stdenv,
   withDoc ? false,
   requireSageTests ? true,
   extraPythonPackages ? ps: [ ],
@@ -12,11 +13,16 @@
 let
   inherit (pkgs) symlinkJoin callPackage mathjax;
 
-  ntl = pkgs.ntl.overrideAttrs (old: {
-    configureFlags = (old.configureFlags or [ ]) ++ [
-      "NTL_THREADS=off"
-    ];
-  });
+  ntl = (
+    if stdenv.hostPlatform.isDarwin then
+      (pkgs.ntl.overrideAttrs (old: {
+        configureFlags = (old.configureFlags or [ ]) ++ [
+          "NTL_THREADS=off"
+        ];
+      }))
+    else
+      pkgs.ntl
+  );
 
   python3 = pkgs.python3 // {
     pkgs = pkgs.python3.pkgs.overrideScope (