From 36f46f769647b6391184a550a21bbbcc54dcba46 Mon Sep 17 00:00:00 2001
From: adisbladis <adisbladis@gmail.com>
Date: Thu, 4 Mar 2021 14:11:52 +0200
Subject: [PATCH] Incorporate string escaping changes from nixpkgs #108086

---
 lib.nix    | 2 +-
 semver.nix | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/lib.nix b/lib.nix
index 4626f7f..6af37b3 100644
--- a/lib.nix
+++ b/lib.nix
@@ -157,7 +157,7 @@ let
       missingBuildBackendError = "No build-system.build-backend section in pyproject.toml. "
         + "Add such a section as described in https://python-poetry.org/docs/pyproject/#poetry-and-pep-517";
       requires = lib.attrByPath [ "build-system" "requires" ] (throw missingBuildBackendError) pyProject;
-      requiredPkgs = builtins.map (n: lib.elemAt (builtins.match "([^!=<>~\[]+).*" n) 0) requires;
+      requiredPkgs = builtins.map (n: lib.elemAt (builtins.match "([^!=<>~[]+).*" n) 0) requires;
     in
     builtins.map (drvAttr: pythonPackages.${drvAttr} or (throw "unsupported build system requirement ${drvAttr}")) requiredPkgs;
 
diff --git a/semver.nix b/semver.nix
index bf00139..0ef1d4c 100644
--- a/semver.nix
+++ b/semver.nix
@@ -3,7 +3,7 @@ let
   inherit (builtins) elemAt match;
   operators =
     let
-      matchWildCard = s: match "([^\*])(\.[\*])" s;
+      matchWildCard = s: match "([^*])(\\.[*])" s;
       mkComparison = ret: version: v: builtins.compareVersions version v == ret;
       mkIdxComparison = idx: version: v:
         let
@@ -52,8 +52,8 @@ let
       #
     };
   re = {
-    operators = "([=><!~\^]+)";
-    version = "([0-9\.\*x]+)";
+    operators = "([=><!~^]+)";
+    version = "([0-9.*x]+)";
   };
   parseConstraint = constraint:
     let