Error after nimble build -d:release
Strangely enough I don't get this on another Nitter instance I run.

This is the tail of the output of `nimble build -d:release --verbose`:

```
Hint: used config file '/home/nitter/.choosenim/toolchains/nim-1.4.8/config/nim.cfg' [Conf]
Hint: used config file '/home/nitter/.choosenim/toolchains/nim-1.4.8/config/config.nims' [Conf]
Hint: used config file '/home/nitter/nitter/config.nims' [Conf]
...............................................................
/home/nitter/.nimble/pkgs/jester-#head/jester.nim(715, 26) Error: undeclared identifier: 'initInterval'
     Error: Build failed for package: nitter
        ... Execution failed with exit code 1
        ... Command: /home/nitter/.nimble/bin/nim c --colors:on --noNimblePath -d:release -d:NimblePkgVersion=0.1.
0 --path:'/home/nitter/.nimble/pkgs/jester-#head' --path:'/home/nitter/.nimble/pkgs/httpbeast-#head' --path:'/home
/nitter/.nimble/pkgs/asynctools-#pr_fix_compilation' --path:'/home/nitter/.nimble/pkgs/asynctools-#pr_fix_compilat
ion' --path:'/home/nitter/.nimble/pkgs/karax-#fa4a2dc' --path:/home/nitter/.nimble/pkgs/ws-0.5.0 --path:/home/nitt
er/.nimble/pkgs/dotenv-2.0.1 --path:'/home/nitter/.nimble/pkgs/sass-#e683aa1' --path:'/home/nitter/.nimble/pkgs/ni
mcrypto-#a5742a9' --path:'/home/nitter/.nimble/pkgs/markdown-#abdbe5e' --path:'/home/nitter/.nimble/pkgs/packedjso
n-#d11d167' --path:'/home/nitter/.nimble/pkgs/supersnappy-#2.1.1' --path:'/home/nitter/.nimble/pkgs/redpool-#8b7c1
db' --path:'/home/nitter/.nimble/pkgs/redis-#d0a0e6f' --path:'/home/nitter/.nimble/pkgs/redis-#d0a0e6f' --path:'/h
ome/nitter/.nimble/pkgs/zippy-#0.7.3' --path:'/home/nitter/.nimble/pkgs/flatty-#0.2.3' --path:'/home/nitter/.nimbl
e/pkgs/jsony-#d0e69bd' -o:/home/nitter/nitter/nitter /home/nitter/nitter/src/nitter.nim

```