Wrong `Duplicate declaration` error in a simple config

For some reason this config is not considered as valid:
```
:: buy
:: buyW

rcmd - b ; buy

buy, buyW < rcmd - escape ; default

buy < rcmd - w ; buyW

buyW < rcmd - u : osascript -e 'tell application "Terminal" to do script "echo buy wu" & activate'
```

```sh
/usr/local/bin/skhd -c ~/.skhdrc
#2:4 duplicate declaration 'buyW'
```
I'm using the latest version installed via brew:
```sh
/usr/local/bin/skhd --version
skhd-v0.3.9
```
The interesting thing is that if I install skhd from the source, this error does not happen. The source code is the same, but result is different. What can be the reason of such behaviour?

Reproduce the supplied config and `/usr/local/bin/skhd -c ~/.skhdrc` with both the Homebrew `skhd-v0.3.9` binary and a source-built binary. Compare their build or package provenance and determine why only one reports the duplicate declaration; done means the binary difference is explained with a reproducible conclusion.

Written by the indexing model from the issue text.