stack build failure

doc/bugs/stack_build_failure_with_recent_update.mdwn

@@ -0,0 +1,63 @@
+On 10abf964f (add new deps, 2020-06-30), `stack build` fails for me
+with
+
+```
+/home/kyle/src/haskell/git-annex/git-lfs 1.1.0/: getDirectoryContents:openDirStream: does not exist (No such file or directory)
+```
+
+I think this is due to a hyphen missing before the version.  I've
+added those locally to stack.yaml (assuming that's correct,
+stack-lts-12.14.yaml should of course get the same update).
+
+[[!format diff """
+diff --git a/stack.yaml b/stack.yaml
+index 8724904f8..0a65a66b6 100644
+--- a/stack.yaml
++++ b/stack.yaml
+@@ -24,8 +24,8 @@ extra-deps:
+  - sandi-0.5
+  - tasty-rerun-1.1.17
+  - torrent-10000.1.1
+- - git-lfs 1.1.0
+- - http-client-restricted 0.0.2
++ - git-lfs-1.1.0
++ - http-client-restricted-0.0.2
+ explicit-setup-deps:
+   git-annex: true
+ resolver: lts-14.27
+"""]]
+
+
+After doing that, it looks like there is a dependency mismatch that
+can't be resolved:
+
+```
+Error: While constructing the build plan, the following exceptions were encountered:
+
+In the dependencies for http-client-restricted-0.0.2:
+    http-client-0.6.4 from stack configuration does not match >=0.5 && <0.6  (latest matching version
+                      is 0.5.14)
+needed due to git-annex-8.20200617 -> http-client-restricted-0.0.2
+
+Some different approaches to resolving this:
+
+  * Set 'allow-newer: true'
+    in /home/kyle/.stack/config.yaml to ignore all version constraints and build anyway.
+
+  * Recommended action: try adding the following to your extra-deps
+    in /home/kyle/src/haskell/git-annex/stack.yaml:
+
+- http-client-0.5.14@sha256:4880b27d6741e331454a1d4c887d96ce3d7d625322c8433983a4b1cd08538577,5348
+
+Plan construction failed.
+```
+
+Here's my stack version, which is running on top of Debian Buster:
+
+```
+$ stack --version
+Version 2.3.1, Git revision de2a7b694f07de7e6cf17f8c92338c16286b2878 (8103 commits) x86_64 hpack-0.33.0
+```
+
+Locally, I've set `httpclientrestricted` and `gitlfs` flags to false
+to use the vendored version for now.