$ cabal install --upgrade-dependencies yesod
Resolving dependencies...
In order, the following would be installed:
base-unicode-symbols-0.2.2.4 (new version)
base64-bytestring-0.1.2.0 (new version)
binary-0.5.1.1 -bytestring-in-base (new version)
SHA-1.5.1 (new version)
case-insensitive-0.4.0.3 (new version)
cpu-0.1.1 (new version)
cryptocipher-0.3.5 (new version)
cprng-aes-0.2.3 (reinstall) changes: cryptocipher-0.3.4 -> 0.3.5
data-default-0.5.0 (new version)
cookie-0.4.0 (reinstall) changes: data-default-0.4.0 -> 0.5.0
http-types-0.7.3 (new version)
monad-control-0.3.1.4 (new version)
lifted-base-0.1.2 (new version)
parsec-3.1.3 (new version)
email-validate-0.2.8 (reinstall) changes: parsec-3.1.2 -> 3.1.3
pem-0.1.1 (reinstall) changes: base64-bytestring-0.1.1.1 -> 0.1.2.0
pureMD5-2.1.0.3 (reinstall) changes: binary-0.5.1.0 -> 0.5.1.1
pwstore-fast-2.2 (reinstall) changes: base64-bytestring-0.1.1.1 -> 0.1.2.0
resourcet-0.3.3.1 (new version)
semigroups-0.8.4 (new version)
skein-0.1.0.8 (new version)
stm-2.4 (new version)
resource-pool-0.2.1.0 (reinstall) changes: monad-control-0.3.1.3 -> 0.3.1.4,
stm-2.3 -> 2.4
pool-conduit-0.1.0.2 (reinstall) changes: resourcet-0.3.2.1 -> 0.3.3.1
stringsearch-0.3.6.3 (new package)
tagsoup-0.12.7 (new version)
unix-2.5.1.1 (new version)
ansi-terminal-0.5.5 (reinstall) changes: unix-2.5.1.0 -> 2.5.1.1
directory-1.1.0.2 (reinstall) changes: unix-2.5.1.0 -> 2.5.1.1
clientsession-0.8.0 (new version)
network-2.3.1.0 (new version)
process-1.1.0.1 (reinstall) changes: unix-2.5.1.0 -> 2.5.1.1
Cabal-1.14.0 (reinstall) changes: unix-2.5.1.0 -> 2.5.1.1
certificate-1.2.5 (new version)
mime-mail-0.4.1.1 (reinstall) changes: base64-bytestring-0.1.1.1 -> 0.1.2.0
shakespeare-1.0.1.1 (new version)
hamlet-1.1.0.2 (new version)
shakespeare-css-1.0.1.4 (new version)
shakespeare-i18n-1.0.0.2 (reinstall) changes: parsec-3.1.2 -> 3.1.3,
shakespeare-1.0.0.2 -> 1.0.1.1
shakespeare-js-1.0.0.5 (new version)
shakespeare-text-1.0.0.4 (new version)
simple-sendfile-0.2.6 (new version)
socks-0.4.2 (new version)
system-fileio-0.3.9 (new version)
tar-0.4.0.0 (new package)
tls-0.9.9 (new version)
tls-extra-0.4.6 (reinstall) changes: certificate-1.2.3 -> 1.2.5,
cryptocipher-0.3.4 -> 0.3.5, network-2.3.0.13 -> 2.3.1.0, tls-0.9.5 -> 0.9.9
unix-compat-0.3.0.1 (reinstall) changes: unix-2.5.1.0 -> 2.5.1.1
unix-time-0.1.2 (new package)
fast-logger-0.2.2 (new version)
monad-logger-0.2.0 (new package)
vault-0.2.0.1 (new version)
void-0.5.7 (new version)
conduit-0.5.2.3 (new version)
attoparsec-conduit-0.5.0 (new version)
blaze-builder-conduit-0.5.0 (new version)
network-conduit-0.5.0 (new version)
persistent-1.0.0 (new version)
persistent-template-1.0.0 (new version)
wai-1.3.0 (new version)
wai-logger-0.2.0 (new version)
warp-1.3.0.1 (new version)
xml-types-0.3.3 (new version)
xml-conduit-1.0.3 (new version)
xss-sanitize-0.3.2 (reinstall) changes: network-2.3.0.13 -> 2.3.1.0,
tagsoup-0.12.6 -> 0.12.7
yaml-0.8.0.1 (new version)
yesod-routes-1.1.0 (new version)
zlib-bindings-0.1.1 (new version)
zlib-conduit-0.5.0 (new version)
http-conduit-1.6.0 (new version)
authenticate-1.3.1 (new version)
wai-extra-1.3.0 (new version)
yesod-core-1.1.1 (new version)
yesod-json-1.1.0 (new version)
yesod-persistent-1.1.0 (new version)
yesod-form-1.1.1 (new version)
yesod-auth-1.1.1 (new version)
yesod-1.1.0.2 (new version)
cabal: The following packages are likely to be broken by the reinstalls:
yesod-platform-1.0.4.2
http-conduit-1.4.1.7
yesod-auth-1.0.2.1
yesod-1.0.1.6
authenticate-1.2.1.1
clientsession-0.7.5
yesod-core-1.0.1.2
yesod-static-1.0.0.3
yesod-persistent-1.0.0.1
yesod-form-1.0.0.4
yesod-json-1.0.0.1
yesod-default-1.0.1.1
wai-test-1.2.0.2
yesod-test-0.2.0.6
certificate-1.2.3
tls-0.9.5
persistent-0.9.0.4
persistent-template-0.9.0.2
wai-extra-1.2.0.4
hspec-1.1.1
wai-app-static-1.2.0.3
silently-1.1.5
shakespeare-css-1.0.1.2
shakespeare-1.0.0.2
shakespeare-text-1.0.0.2
shakespeare-js-1.0.0.3
hamlet-1.0.1.3
haskell98-2.0.0.1
ghc-7.4.1
bin-package-db-0.0.0.0
hxt-9.2.2
hpc-0.5.1.1
file-embed-0.0.4.4
fast-logger-0.0.2
wai-logger-0.1.4
warp-1.2.1.1
Use --force-reinstalls if you want to install anyway.