doc/bugs/Cannot_build_with_aws_0.17.1.mdwn

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+### Please describe the problem.
+git-annex doesn't build if the aws dependency is version 0.17.1
+
+This probably wasn't caught during your testing because the stack.yaml is currently set to use aws-0.16.
+
+### What steps will reproduce the problem?
+cabal install with --flags=s3\ webapp
+
+### What version of git-annex are you using? On what operating system?
+6.20171003 on macOS
+
+### Please provide any additional information below.
+
+The error is
+
+[[!format sh """
+[327 of 580] Compiling Remote.Helper.Http ( Remote/Helper/Http.hs, dist/dist-sandbox-69bd6735/build/git-annex/git-annex-tmp/Remote/Helper/Http.o )
+[328 of 580] Compiling Remote.WebDAV    ( Remote/WebDAV.hs, dist/dist-sandbox-69bd6735/build/git-annex/git-annex-tmp/Remote/WebDAV.o )
+[329 of 580] Compiling Remote.S3        ( Remote/S3.hs, dist/dist-sandbox-69bd6735/build/git-annex/git-annex-tmp/Remote/S3.o )
+
+Remote/S3.hs:501:57: error:
+    • Couldn't match expected type ‘AWS.Configuration’
+                  with actual type ‘Maybe
+                                      http-client-0.5.7.0:Network.HTTP.Client.Types.Proxy
+                                    -> AWS.Configuration’
+    • Probable cause: ‘awscfg’ is applied to too few arguments
+      In the second argument of ‘S3Handle’, namely ‘awscfg’
+      In the second argument of ‘($)’, namely ‘S3Handle mgr awscfg s3cfg’
+      In the second argument of ‘($)’, namely
+        ‘Just $ S3Handle mgr awscfg s3cfg’
+    |
+501 |                                 a $ Just $ S3Handle mgr awscfg s3cfg
+    |                                                         ^^^^^^
+cabal: Leaving directory '.'
+cabal: Error: some packages failed to install:
+git-annex-6.20171003-5GFRliFOEl0KqDuhwYRTdH failed during the building phase.
+The exception was:
+ExitFailure 1
+"""]]
+
+Full build log is here: https://gist.github.com/ilovezfs/661a158dbe8aac33802f9b43eb150539
+
+### Have you had any luck using git-annex before? (Sometimes we get tired of reading bug reports all day and a lil' positive end note does wonders)
+
+Yes! :)