diff --git a/artiq-fast/artiq-board-legacy.nix b/artiq-fast/artiq-board-legacy.nix
index ac591af..ba1c788 100644
--- a/artiq-fast/artiq-board-legacy.nix
+++ b/artiq-fast/artiq-board-legacy.nix
@@ -96,4 +96,6 @@ pkgs.python3Packages.toPythonModule (pkgs.stdenv.mkDerivation rec {
     fi
     ${extraInstallCommands}
     '';
+  # don't mangle ELF files as they are not for NixOS
+  dontFixup = true;
 })
diff --git a/artiq-fast/artiq-board.nix b/artiq-fast/artiq-board.nix
index 7850c4d..006f144 100644
--- a/artiq-fast/artiq-board.nix
+++ b/artiq-fast/artiq-board.nix
@@ -91,6 +91,8 @@ let
         fi
         ${extraInstallCommands}
         '';
+      # don't mangle ELF files as they are not for NixOS
+      dontFixup = true;
     };
 
   identifierStr = "${version};${variant}";