Matrix not found during Docker build of unmarked package - Error in loadNamespace()

[lucytallents]

I'm attempting to build the unmarked package with the webr Docker container as documented in https://r-wasm.github.io/rwasm/articles/rwasm.html, but build() fails because the Matrix package isn't found, despite it being installed

Command (I've also tried without specifying hard dependencies):

build("unmarked", dependencies = NA)

Errors:

Error in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]) : 
  there is no package called 'Matrix'
Calls: loadNamespace ... loadNamespace -> withRestarts -> withOneRestart -> doWithOneRestart
Execution halted
make: *** [Makevars:22: tmblib] Error 1
ERROR: compilation failed for package 'unmarked'
* removing '/tmp/RtmpCQg5cK/file13c4db590/unmarked'
Error in wasm_build(pkg, tarball_path, out_dir, compress) : 
  Building wasm binary for package 'unmarked' failed.

Matrix did appear to install successfully, based on this message while build() was running...

packaged installation of 'Matrix' as 'Matrix_1.7-0_R_x86_64-pc-linux-gnu.tar.gz'
* DONE (Matrix)
Appending virtual filesystem metadata for: Matrix_1.7-0.tgz

...and my session info:

R version 4.4.1 (2024-06-14)
Platform: x86_64-pc-linux-gnu
Running under: Ubuntu 24.04 LTS

Matrix products: default
BLAS:   /usr/lib/x86_64-linux-gnu/openblas-pthread/libblas.so.3 
LAPACK: /usr/lib/x86_64-linux-gnu/openblas-pthread/libopenblasp-r0.3.26.so;  LAPACK version 3.12.0

locale:
[1] C

time zone: UTC
tzcode source: system (glibc)

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

other attached packages:
[1] Matrix_1.7-0     unmarked_1.4.3   rwasm_0.2.0.9000

loaded via a namespace (and not attached):
 [1] vctrs_0.6.5      cli_3.6.3        rlang_1.1.4      processx_3.8.4  
 [5] generics_0.1.3   jsonlite_1.8.9   glue_1.7.0       ps_1.8.0        
 [9] pak_0.8.0        fansi_1.0.6      grid_4.4.1       tibble_3.2.1    
[13] filelock_1.0.3   MASS_7.3-60.2    pkgdepends_0.8.0 lifecycle_1.0.4 
[17] compiler_4.4.1   dplyr_1.1.4      pkgcache_2.2.3   fs_1.6.4        
[21] Rcpp_1.0.13      pkgconfig_2.0.3  lattice_0.22-6   R6_2.5.1        
[25] tidyselect_1.2.1 utf8_1.2.4       parallel_4.4.1   pillar_1.9.0    
[29] curl_5.2.3       callr_3.7.6      magrittr_2.0.3   tools_4.4.1     
[33] withr_3.0.1     

My libPaths:

[1] "/root/R/x86_64-pc-linux-gnu-library/4.4"
[2] "/opt/R/4.4.1/lib/R/site-library"        
[3] "/opt/R/4.4.1/lib/R/library"  

Can anyone advise on a way forward, or help me diagnose the underlying issue?