Error with `future::plan(future::cluster, workers = c('rey', 'r2d2'))`

[ramiromagno]

future::plan(future::cluster, workers = c('rey', 'r2d2'))

fish: Unknown command: /usr/lib64/R/bin/Rscript
fish: 
'/usr/lib64/R/bin/Rscript' --default-packages=datasets,utils,grDevices,graphics,stats,methods -e 'options(socketOptions = "no-delay")' -e 'workRSOCK <- tryCatch(parallel:::.workRSOCK, error=function(e) parallel:::.slaveRSOCK); workRSOCK()' MASTER=localhost PORT=11329 OUT=/dev/null TIMEOUT=2592000 XDR=FALSE SETUPTIMEOUT=120 SETUPSTRATEGY=sequential
^

and it hangs and I have to stop the process.

Session information

> sessionInfo()
R version 4.1.2 (2021-11-01)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Arch Linux

Matrix products: default
BLAS:   /usr/lib/libopenblasp-r0.3.18.so
LAPACK: /usr/lib/liblapack.so.3.10.0

locale:
 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C               LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8    
 [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8    LC_PAPER=en_US.UTF-8       LC_NAME=C                 
 [9] LC_ADDRESS=C               LC_TELEPHONE=C             LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C       

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] daeqtlr_0.1.0

loaded via a namespace (and not attached):
 [1] compiler_4.1.2     parallelly_1.31.1  magrittr_2.0.1     cli_3.3.0          parallel_4.1.2     tools_4.1.2       
 [7] future.apply_1.9.0 listenv_0.8.0      codetools_0.2-18   data.table_1.14.2  digest_0.6.28      globals_0.14.0    
[13] rlang_1.0.2        future_1.25.0     

> future::futureSessionInfo()
*** Package versions
future 1.25.0, parallelly 1.31.1, parallel 4.1.2, globals 0.14.0, listenv 0.8.0

*** Allocations
availableCores():
system  nproc 
     6      6 
availableWorkers():
$system
[1] "localhost" "localhost" "localhost" "localhost" "localhost" "localhost"

*** Settings
- future.plan=<not set>
- future.fork.multithreading.enable=<not set>
- future.globals.maxSize=<not set>
- future.globals.onReference=<not set>
- future.resolve.recursive=<not set>
- future.rng.onMisuse=<not set>
- future.wait.timeout=<not set>
- future.wait.interval=<not set>
- future.wait.alpha=<not set>
- future.startup.script=<not set>

*** Backends
Number of workers: 2
List of future strategies:
1. cluster:
   - args: function (..., workers = c("rey", "r2d2"), envir = parent.frame())
   - tweaked: TRUE
   - call: future::plan(future::cluster, workers = c("rey", "r2d2"))

*** Basic tests
fish: Unknown command: /usr/lib64/R/bin/Rscript
fish: 
'/usr/lib64/R/bin/Rscript' --default-packages=datasets,utils,grDevices,graphics,stats,methods -e 'options(socketOptions = "no-delay")' -e 'workRSOCK <- tryCatch(parallel:::.workRSOCK, error=function(e) parallel:::.slaveRSOCK); workRSOCK()' MASTER=localhost PORT=11091 OUT=/dev/null TIMEOUT=2592000 XDR=FALSE SETUPTIMEOUT=120 SETUPSTRATEGY=sequential
^

also hangs here.