gleam-lang/gleam
Compilation breaks when renaming project directory
Aberta
#5.430 aberto em 5 de mar. de 2026
help wanted
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Description
Renaming a gleam project directory causes a compilation error. Running the following shell commands (on Arch Linux):
gleam new repro
cd repro
gleam add lustre
gleam build
cd ..
mv repro repro_broken
cd repro_broken
gleam build
Result in the following error:
error: File IO failure
An error occurred while trying to link this file:
/tmp/tmp.QzSnQdYrRy/repro_broken/build/dev/erlang/lustre/priv
The error message from the file IO library was:
File exists (os error 17)
Running gleam build a second time seems to fix the error.
I routinely run into this because I run gleam projects via bind mounts in various development containers. It's a bit of a weird setup :D
I didn't do a super deep investigation but it seems related to the symlinks to priv, e.g. in build/dev/erlang/lustre:
ll build/dev/erlang/lustre
Permissions Size User Group Date Modified Name
...
lrwxrwxrwx - rafael rafael 5 Mär 11:50 priv -> /tmp/tmp.QzSnQdYrRy/repro/build/packages/lustre/priv
Would it be an option to use relative links instead? Or to find broken symlinks and recreate them?
In both cases, this seems like an easy issue to fix, if someone is interested in giving some hints I'd like to make a PR :)