1 files changed, 5 insertions, 2 deletions
diff --git a/nixpkgs/pkgs/development/python-modules/cxxfilt/default.nix b/nixpkgs/pkgs/development/python-modules/cxxfilt/default.nix
index 580d698d8dab..1cc5ad19bda2 100644
--- a/nixpkgs/pkgs/development/python-modules/cxxfilt/default.nix
+++ b/nixpkgs/pkgs/development/python-modules/cxxfilt/default.nix
@@ -1,4 +1,5 @@
 { lib
+, stdenv
 , buildPythonPackage
 , fetchPypi
 , gcc-unwrapped
@@ -12,9 +13,11 @@ buildPythonPackage rec {
     sha256 = "ef6810e76d16c95c11b96371e2d8eefd1d270ec03f9bcd07590e8dcc2c69e92b";
   };
 
-  postPatch = ''
+  postPatch = let
+    libstdcpp = "${lib.getLib gcc-unwrapped}/lib/libstdc++${stdenv.hostPlatform.extensions.sharedLibrary}";
+  in ''
     substituteInPlace cxxfilt/__init__.py \
-      --replace "find_any_library('stdc++', 'c++')" '"${lib.getLib gcc-unwrapped}/lib/libstdc++.so"'
+      --replace "find_any_library('stdc++', 'c++')" '"${libstdcpp}"'
   '';
 
   # no tests