[nix-shell:~/tmp/qewr/system-fileio-0.3.16]$ cabal test
Preprocessing library system-fileio-0.3.16...
In-place registering system-fileio-0.3.16...
Preprocessing test suite 'filesystem_tests' for system-fileio-0.3.16...
Running 1 test suites...
Test suite filesystem_tests: RUNNING...
[ ABORT ] posix.copyFile.iso8859
  Test aborted due to exception: /var/folders/lj/655x29_s66718hvw6bdcvy1w0000gn/T/tests.iso8859.23369/old_¡¢£.txt: openBinaryFile: does not exist (No such file or directory)

[ ABORT ] posix.withFile.read.iso8859
  Test aborted due to exception: /var/folders/lj/655x29_s66718hvw6bdcvy1w0000gn/T/tests.read.iso8859.23369/¡¢£.txt: openBinaryFile: does not exist (No such file or directory)

[ ABORT ] posix.withTextFile.iso8859
  Test aborted due to exception: /var/folders/lj/655x29_s66718hvw6bdcvy1w0000gn/T/tests.iso8859.23369/¡¢£.txt: openFile: does not exist (No such file or directory)

FAIL: 81 tests run, 66 tests passed, 12 tests skipped, 3 tests aborted
Test suite filesystem_tests: FAIL
Test suite logged to: dist/test/system-fileio-0.3.16-filesystem_tests.log
0 of 1 test suites (0 of 1 test cases) passed.