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warning: ''\a is an ill-defined escape. You can drop the ''\ and simply write a instead. Use --extra-deprecated-features broken-string-escape to silence this warning.
         at /pwd/in.nix:2:4:
              1| ''
              2| ''\a''\n
               |    ^
              3| ''\f''\{''\$''\"''\'''\r''\v''\\''\t
warning: ''\f is an ill-defined escape. You can drop the ''\ and simply write f instead. Use --extra-deprecated-features broken-string-escape to silence this warning.
         at /pwd/in.nix:3:4:
              2| ''\a''\n
              3| ''\f''\{''\$''\"''\'''\r''\v''\\''\t
               |    ^
              4| ''\'''${"x"}
warning: ''\{ is an ill-defined escape. You can drop the ''\ and simply write { instead. If you meant to escape an interpolation, write ''${ instead. Use --extra-deprecated-features broken-string-escape to silence this warning.
         at /pwd/in.nix:3:8:
              2| ''\a''\n
              3| ''\f''\{''\$''\"''\'''\r''\v''\\''\t
               |        ^
              4| ''\'''${"x"}
warning: ''\$ is an ill-defined escape. You can drop the ''\ and simply write $ instead. If you meant to escape an interpolation, write ''${ instead. Use --extra-deprecated-features broken-string-escape to silence this warning.
         at /pwd/in.nix:3:12:
              2| ''\a''\n
              3| ''\f''\{''\$''\"''\'''\r''\v''\\''\t
               |            ^
              4| ''\'''${"x"}
warning: ''\" is an ill-defined escape. You can drop the ''\ and simply write " instead. Use --extra-deprecated-features broken-string-escape to silence this warning.
         at /pwd/in.nix:3:16:
              2| ''\a''\n
              3| ''\f''\{''\$''\"''\'''\r''\v''\\''\t
               |                ^
              4| ''\'''${"x"}
warning: ''\v is an ill-defined escape. You can drop the ''\ and simply write v instead. Use --extra-deprecated-features broken-string-escape to silence this warning.
         at /pwd/in.nix:3:28:
              2| ''\a''\n
              3| ''\f''\{''\$''\"''\'''\r''\v''\\''\t
               |                            ^
              4| ''\'''${"x"}
warning: ''\\ is an ill-defined escape. You can drop the ''\ and simply write \ instead. Use --extra-deprecated-features broken-string-escape to silence this warning.
         at /pwd/in.nix:3:32:
              2| ''\a''\n
              3| ''\f''\{''\$''\"''\'''\r''\v''\\''\t
               |                                ^
              4| ''\'''${"x"}
warning: ''\$ is an ill-defined escape. You can drop the ''\ and simply write $ instead. If you meant to escape an interpolation, write ''${ instead. Use --extra-deprecated-features broken-string-escape to silence this warning.
         at /pwd/in.nix:7:4:
              6| ''${interpolation}
              7| ''\${bad interpolation 1}
               |    ^
              8| $''\{bad interpolation 2}
warning: ''\{ is an ill-defined escape. You can drop the ''\ and simply write { instead. If you meant to escape an interpolation, write ''${ instead. Use --extra-deprecated-features broken-string-escape to silence this warning.
         at /pwd/in.nix:8:5:
              7| ''\${bad interpolation 1}
              8| $''\{bad interpolation 2}
               |     ^
              9| ''