Add haskell-tagged-transformer 0.7.1
Merge pull request #3883 from dmalikov/haskell-tagged-transformer

Add haskell-tagged-transformer 0.7.1
mcabber: fix mispelled stdenv
lirc: add missing semicolon
nixos/tests-installer: Add a test for btrfs default volumes and bind mounts
nixos/installer-test: Use nested subvolumes for root to test detection
nixos/generate-config: Support detecting nested subvolumes
nixos/install-grub: Detect nested btrfs subvolumes
nixos/generate-config: Don't interpret btrfs subvols as bind mounts