For loop fails as script but works in the REPL

[sebastien]

What happened, and what did you expect to happen?

When running the following script using elvish script.elv fails with the following error Exception: exec: "str:trim": executable file not found in $PATH. However, copy-pasting each line in the REPL works as expected.

Script:

var lines = [one two three]
for line $lines { echo (str:trim $line ' ') }

Using Elvish 0.21.0

Output of "elvish -version"

0.21.0

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