The dune build command raises the following exception when a Unix domain socket file is in the same directory:

Error: exception Sys_error("fail.sock: No such device or address")

Reproduction

1.) Create a new directory

2.) Create a "dune' file with the following content

(executable
 (name unixsocket)
 (libraries unix))

3.) Create a "dune-project" file with the following content

(lang dune 2.2)

4.) Create an empty .ml file without code.

echo "" > unixsocket.ml

5.) Create a Unix domain socket file (press ctrl+c to quit netcat)

nc -Ul fail.sock

6.) Run "dune build"

Specifications

• Version of dune (output of dune --version): 2.2.0
• Version of ocaml (output of ocamlc --version): 4.09.0
• Operating system (distribution and version): Debian GNU/Linux 10 (buster)

Additional information

https://gist.github.com/verbosemode/7e7374309df5d6436a3400737fd8b3ad