diff --git a/pkgs/development/python-modules/amaranth-boards/default.nix b/pkgs/development/python-modules/amaranth-boards/default.nix
index 3e9548bfe5b6..a010d3570b7c 100644
--- a/pkgs/development/python-modules/amaranth-boards/default.nix
+++ b/pkgs/development/python-modules/amaranth-boards/default.nix
@@ -19,7 +19,9 @@ buildPythonPackage rec {
     owner = "amaranth-lang";
     repo = "amaranth-boards";
     rev = "aba2300dc83216523e1c98fdb22471cb4bac5027";
-    hash = "sha256-IMhNMkOf6dg4Djyi39TDTpU0S3TQM1+e6TBoyiITaos=";
+    # these files change depending on git branch status
+    postFetch = "rm -f $out/.git_archival.txt $out/.gitattributes";
+    hash = "sha256-jldXyMJtuSGcZKmtwpZBYrR/UBe4ufblPYRYpBmReM8=";
   };
 
   nativeBuildInputs = [