error:
       … while evaluating the condition of the assertion '({ foo = { outPath = "/nix/store/0"; type = "derivation"; }; } == { foo = { devious = true; outPath = "/nix/store/1"; type = "derivation"; }; })'
         at /pwd/lang/eval-fail-assert-equal-derivations-extra.nix:1:1:
            1| assert
             | ^
            2|   { foo = { type = "derivation"; outPath = "/nix/store/0"; }; }

       … while comparing attribute 'foo'

       … where left hand side is
         at /pwd/lang/eval-fail-assert-equal-derivations-extra.nix:2:5:
            1| assert
            2|   { foo = { type = "derivation"; outPath = "/nix/store/0"; }; }
             |     ^
            3|   ==

       … where right hand side is
         at /pwd/lang/eval-fail-assert-equal-derivations-extra.nix:4:5:
            3|   ==
            4|   { foo = { type = "derivation"; outPath = "/nix/store/1"; devious = true; }; };
             |     ^
            5| throw "unreachable"

       … while comparing a derivation by its 'outPath' attribute

       error: string '"/nix/store/0"' is not equal to string '"/nix/store/1"'