sage: import networkx 2.7 update patch

pkgs/applications/science/math/sage/sage-src.nix

@@ -156,6 +156,14 @@ stdenv.mkDerivation rec {
 
     # adapted from https://trac.sagemath.org/ticket/23712#comment:22
     ./patches/tachyon-renamed-focallength.patch
+
+    # https://trac.sagemath.org/ticket/33495
+    (fetchSageDiff {
+      base = "9.6.beta5";
+      name = "networkx-2.7-update.patch";
+      rev = "8452003846a7303100847d8d0ed642fc642c11d6";
+      sha256 = "sha256-A/XMouPlc2sjFp30L+56fBGJXydS2EtzfPOV98FCDqI=";
+    })
   ];
 
   patches = nixPatches ++ bugfixPatches ++ packageUpgradePatches;

pkgs/applications/science/math/sage/sagelib.nix

@@ -181,11 +181,16 @@ buildPythonPackage rec {
     # some files, like Pipfile, pyproject.toml, requirements.txt and setup.cfg
     # are generated by the bootstrap script using m4. these can fetch data from
     # build/pkgs, either directly or via sage-get-system-packages.
-    sed -i 's/==2.1.0rc1/>=2.1.1/' ../gmpy2/install-requires.txt
-    sed -i 's/, <3.4//' ../rpy2/install-requires.txt
-    sed -i 's/, <4.3//' ../sphinx/install-requires.txt
     sed -i '/sage_conf/d' src/setup.cfg.m4
     sed -i '/sage_conf/d' src/requirements.txt.m4
+
+    # version lower bounds are useful, but upper bounds are a hassle because
+    # Sage tests already catch any relevant API breakage.
+    # according to the discussion at https://trac.sagemath.org/ticket/33520,
+    # upper bounds will be less noisy starting from Sage 9.6.
+    sed -i 's/==2.1.0rc1/>=2.1.1/' ../gmpy2/install-requires.txt
+    sed -i 's/, <[^, ]*//' ../*/install-requires.txt
+
     for infile in src/*.m4; do
         if [ -f "$infile" ]; then
             outfile="src/$(basename $infile .m4)"