diff --git a/.github/workflows/release-file-system-image.yml b/.github/workflows/release-file-system-image.yml
index 04bd4fd..75d45d5 100644
--- a/.github/workflows/release-file-system-image.yml
+++ b/.github/workflows/release-file-system-image.yml
@@ -62,7 +62,8 @@ jobs:
           has_wasm_need <-
             file.exists("DESCRIPTION") &&
             "Config/Needs/wasm" %in% names(as.list(read.dcf("DESCRIPTION")[1,]))
-          pkg <- if (has_wasm_need) "Config/Needs/wasm" else ""
+          pkg <- if (has_wasm_need) as.list(read.dcf("DESCRIPTION")[1,])$`Config/Needs/wasm` else ""
+          pkg <- paste0(strsplit(pkg, "[[:space:],]+")[[1]], collapse = ",")
           cat("pkg=", pkg, "\n", file = Sys.getenv("GITHUB_OUTPUT"), sep = "", append = TRUE)
 
       - name: Build wasm image