http-client-tls-0.3.6.4 is missing lowerbound on tls (>= 2.1.2)

I am now getting this error ``` Building library for http-client-tls-0.3.6.4.. [1 of 1] Compiling Network.HTTP.Client.TLS ( Network/HTTP/Client/TLS.hs, dist/build/Network/HTTP/Client/TLS.o, dist/build/Network/HTTP/Client/TLS.dyn_o ) Network/HTTP/Client/TLS.hs:118:40: error: [GHC-39999] • No instance for ‘Default NC.TLSSettings’ arising from a use of ‘def’ • In the first argument of ‘mkManagerSettings’, namely ‘def’ In the expression: mkManagerSettings def Nothing In an equation for ‘tlsManagerSettings’: tlsManagerSettings = mkManagerSettings def Nothing | 118 | tlsManagerSettings = mkManagerSettings def Nothing | ^^^ Network/HTTP/Client/TLS.hs:192:100: error: [GHC-39999] • Could not deduce ‘Default NC.TLSSettings’ arising from a use of ‘def’ from the context: MonadIO m bound by the type signature for: newTlsManager :: forall (m :: * -> *). MonadIO m => m Manager at Network/HTTP/Client/TLS.hs:186:1-39 • In the third argument of ‘mkManagerSettingsContext'’, namely ‘def’ In the expression: mkManagerSettingsContext' defaultManagerSettings (Just globalConnectionContext) def msocksHTTP msocksHTTPS In an equation for ‘settings’: settings = mkManagerSettingsContext' defaultManagerSettings (Just globalConnectionContext) def msocksHTTP msocksHTTPS | 192 | settings = mkManagerSettingsContext' defaultManagerSettings (Just globalConnectionContext) def msocksHTTP msocksHTTPS | ^^^ Network/HTTP/Client/TLS.hs:208:81: error: [GHC-39999] • Could not deduce ‘Default NC.TLSSettings’ arising from a use of ‘def’ from the context: MonadIO m bound by the type signature for: newTlsManagerWith :: forall (m :: * -> *). MonadIO m => ManagerSettings -> m Manager at Network/HTTP/Client/TLS.hs:202:1-62 • In the third argument of ‘mkManagerSettingsContext'’, namely ‘def’ In the expression: mkManagerSettingsContext' set (Just globalConnectionContext) def msocksHTTP msocksHTTPS In an equation for ‘settings’: settings = mkManagerSettingsContext' set (Just globalConnectionContext) def msocksHTTP msocksHTTPS | 208 | settings = mkManagerSettingsContext' set (Just globalConnectionContext) def msocksHTTP msocksHTTPS | ^^^ Error: cabal: Failed to build http-client-tls-0.3.6.4 (which is required by darcs-2.19.1). See the build log above for details. ``` Specifying `http-client-tls < 0.3.6.4` (instead of `< 0.4` which we had before) fixes our build, but this is not a good solution in the long run, since it cuts us off from bug fixes etc.