diff --git a/.github/workflows/Test.yml b/.github/workflows/Test.yml
index 1399b57..4e73427 100644
--- a/.github/workflows/Test.yml
+++ b/.github/workflows/Test.yml
@@ -11,6 +11,9 @@ on:
         paths-ignore:
             - "**.md"
 
+env:
+    NPM_CONFIG_LOGLEVEL: verbose
+
 jobs:
     test:
         runs-on: ${{ matrix.os }}
diff --git a/src/setup_build.jl b/src/setup_build.jl
index f7df715..d85592b 100644
--- a/src/setup_build.jl
+++ b/src/setup_build.jl
@@ -9,31 +9,49 @@ const node_root_files = (
     @path(joinpath(dirname(@__DIR__), "node", "package.json")),
 )
 
-const npm = !Sys.iswindows() ? NodeJS_20_jll.npm : let
-    new = "$(NodeJS_20_jll.npm).cmd"
-    isfile(new) ? new : NodeJS_20_jll.npm
+
+function npm_cmd()
+    npm = !Sys.iswindows() ? NodeJS_20_jll.npm : let
+        new = "$(NodeJS_20_jll.npm).cmd"
+        isfile(new) ? new : NodeJS_20_jll.npm
+    end
+    
+    # Add NodeJS PATH to the existing PATH environment variable 
+    path_sep = Sys.iswindows() ? ';' : ':'
+    path_list = prepend!(split(get(ENV, "PATH", ""), path_sep), NodeJS_20_jll.PATH_list)
+    path = join(path_list, path_sep)
+    addenv(`$(npm)`, "PATH" => path)
 end
 
 function get_build_dir()
-    build_node(@get_scratch!("build_dir3"))
+    build_node(@get_scratch!("build_dir4"))
 end
 
+const node_build_lock = ReentrantLock()
 
 function build_node(dir)
-    @info "PlutoPDF: Running npm install in scratch space..."
-    
-    if dir !== dirname(node_root_files[1])
-        for f in node_root_files
-            readwrite(f, joinpath(dir, basename(f)))
+    lock(node_build_lock) do
+        @info "PlutoPDF: Running npm install in scratch space..."
+        
+        if dir !== dirname(node_root_files[1])
+            for f in node_root_files
+                readwrite(f, joinpath(dir, basename(f)))
+            end
         end
+        
+        npm_cache_dir = @get_scratch!("npm_cache")
+        
+        cmd = addenv(npm_cmd(), "NPM_CONFIG_CACHE" => npm_cache_dir)
+        
+        @info "huh" cmd
+        
+        cd(dir) do
+            run(`$(cmd) --version`)
+            run(`$(cmd) install --audit-level=none --no-fund --no-audit`)
+        end
+        
+        dir
     end
-    
-    cd(dir) do
-        run(`$npm --version`)
-        run(`$npm install`)
-    end
-    
-    dir
 end
 
 "Like `cp` except we create the file manually (to fix permission issues). (It's not plagiarism if you use this function to copy homework.)"