diff --git a/src/main/java/org/hl7/fhir/tools/converters/NarrativeRemover.java b/src/main/java/org/hl7/fhir/tools/converters/NarrativeRemover.java
index 4d759b6..d31b05e 100644
--- a/src/main/java/org/hl7/fhir/tools/converters/NarrativeRemover.java
+++ b/src/main/java/org/hl7/fhir/tools/converters/NarrativeRemover.java
@@ -67,7 +67,7 @@ public static void main(String[] args) throws FHIRFormatError, FileNotFoundExcep
   private void start(File file) throws FHIRException, IOException  {
     ini = new IniFile("/Users/grahamegrieve/work/r5/source/oids.ini");
     checkIni();
-    r4 = new FilesystemPackageCacheManager(org.hl7.fhir.utilities.npm.FilesystemPackageCacheManager.FilesystemPackageCacheMode.USER).loadPackage("hl7.fhir.r4.core");
+    r4 = new FilesystemPackageCacheManager.Builder().build().loadPackage("hl7.fhir.r4.core");
     ctxt = new SimpleWorkerContextBuilder().fromPackage(r4, new R4ToR5Loader(BuildWorkerContext.defaultTypesToLoad(), new TempLoader(), "4.0.0"), false);
     remove(file);
   }
diff --git a/src/main/java/org/hl7/fhir/tools/converters/R5RedirectBuilder.java b/src/main/java/org/hl7/fhir/tools/converters/R5RedirectBuilder.java
index 2755d6e..8e87655 100644
--- a/src/main/java/org/hl7/fhir/tools/converters/R5RedirectBuilder.java
+++ b/src/main/java/org/hl7/fhir/tools/converters/R5RedirectBuilder.java
@@ -192,7 +192,7 @@ private void buildMap(String web) throws IOException {
         }
       }
     }
-    FilesystemPackageCacheManager pcm = new FilesystemPackageCacheManager(true);
+    FilesystemPackageCacheManager pcm = new FilesystemPackageCacheManager.Builder().build();
     Map<String, String> urlMap = new HashMap<>();
     loadFromPackage(files, urlMap, "", pcm.loadPackage("hl7.fhir.r5.core"));
     loadFromPackage(files, urlMap, "", pcm.loadPackage("hl7.fhir.r5.examples"));
diff --git a/src/main/java/org/hl7/fhir/tools/converters/StructureDefinitionScanner.java b/src/main/java/org/hl7/fhir/tools/converters/StructureDefinitionScanner.java
index f31dfff..940f5ff 100644
--- a/src/main/java/org/hl7/fhir/tools/converters/StructureDefinitionScanner.java
+++ b/src/main/java/org/hl7/fhir/tools/converters/StructureDefinitionScanner.java
@@ -29,7 +29,7 @@ public static void main(String[] args) throws FHIRException, IOException {
   
   private void run(File file) throws FHIRException, IOException {
     System.out.println("Loading");
-    FilesystemPackageCacheManager pcm = new FilesystemPackageCacheManager(true);
+    FilesystemPackageCacheManager pcm = new FilesystemPackageCacheManager.Builder().build();
     NpmPackage npm = pcm.loadPackage("hl7.fhir.r5.core");
     context = new SimpleWorkerContextBuilder().fromPackage(npm);
     fpe = new FHIRPathEngine(context);
diff --git a/src/main/java/org/hl7/fhir/tools/converters/TerminologyFixer.java b/src/main/java/org/hl7/fhir/tools/converters/TerminologyFixer.java
index 81c9e5d..d400be4 100644
--- a/src/main/java/org/hl7/fhir/tools/converters/TerminologyFixer.java
+++ b/src/main/java/org/hl7/fhir/tools/converters/TerminologyFixer.java
@@ -43,7 +43,7 @@ public static void main(String[] args) throws FHIRFormatError, FileNotFoundExcep
   private void start(File file) throws FHIRException, IOException  {
     load(file);
     
-    NpmPackage npm = new FilesystemPackageCacheManager(true).loadPackage("hl7.terminology");
+    NpmPackage npm = new FilesystemPackageCacheManager.Builder().build().loadPackage("hl7.terminology");
     for (String s : npm.listResources("CodeSystem")) {
       CodeSystem cs = (CodeSystem) new JsonParser().parse(npm.load("package", s));
       tho.put(cs.getUrl(), cs);
diff --git a/src/main/java/org/hl7/fhir/tools/converters/VersionTransformGenerator.java b/src/main/java/org/hl7/fhir/tools/converters/VersionTransformGenerator.java
index a1a8362..8657ee7 100644
--- a/src/main/java/org/hl7/fhir/tools/converters/VersionTransformGenerator.java
+++ b/src/main/java/org/hl7/fhir/tools/converters/VersionTransformGenerator.java
@@ -43,7 +43,7 @@ public static void main(String[] args) throws FHIRException, IOException {
   
   private void run(File file) throws FHIRException, IOException {
     System.out.println("Loading");
-    FilesystemPackageCacheManager pcm = new FilesystemPackageCacheManager(true);
+    FilesystemPackageCacheManager pcm = new FilesystemPackageCacheManager.Builder().build();
     NpmPackage npm = pcm.loadPackage("hl7.fhir.r5.core#current");
     context = new SimpleWorkerContextBuilder().fromPackage(npm);
     cu = new ContextUtilities(context);
diff --git a/src/main/java/org/hl7/fhir/tools/publisher/PageProcessor.java b/src/main/java/org/hl7/fhir/tools/publisher/PageProcessor.java
index 3431dbc..658d4e5 100644
--- a/src/main/java/org/hl7/fhir/tools/publisher/PageProcessor.java
+++ b/src/main/java/org/hl7/fhir/tools/publisher/PageProcessor.java
@@ -10447,16 +10447,16 @@ public void setDefinitions(Definitions definitions) throws Exception {
     workerContext.setLogger(this);
     workerContext.setAllowLoadingDuplicates(true);
     log("Load UTG Terminology", LogMessageType.Process);
-    utg = new FilesystemPackageCacheManager(org.hl7.fhir.utilities.npm.FilesystemPackageCacheManager.FilesystemPackageCacheMode.USER).loadPackage("hl7.terminology");
+    utg = new FilesystemPackageCacheManager.Builder().build().loadPackage("hl7.terminology");
     workerContext.loadFromPackage(utg, new R4ToR5Loader(BuildWorkerContext.defaultTypesToLoad(), new UTGLoader(utg.version()), workerContext.getVersion()));
     log("Load Extensions", LogMessageType.Process);
-    ext = new FilesystemPackageCacheManager(org.hl7.fhir.utilities.npm.FilesystemPackageCacheManager.FilesystemPackageCacheMode.USER).loadPackage("hl7.fhir.uv.extensions", "current");
+    ext = new FilesystemPackageCacheManager.Builder().build().loadPackage("hl7.fhir.uv.extensions", "current");
     workerContext.loadFromPackage(ext, new R4ToR5Loader(BuildWorkerContext.extensionTypesToLoad(), new ExtensionsLoader(ext.version(), extensionsLocation), workerContext.getVersion()));
     log("Load DICOM Terminology", LogMessageType.Process);
-    dicom = new FilesystemPackageCacheManager(org.hl7.fhir.utilities.npm.FilesystemPackageCacheManager.FilesystemPackageCacheMode.USER).loadPackage("fhir.dicom");
+    dicom = new FilesystemPackageCacheManager.Builder().build().loadPackage("fhir.dicom");
     workerContext.loadFromPackage(dicom, new R4ToR5Loader(BuildWorkerContext.defaultTypesToLoad(), new DICOMLoader(utg.version()), workerContext.getVersion()));
     log("Load IHE Format Codes", LogMessageType.Process);
-    NpmPackage ihe = new FilesystemPackageCacheManager(org.hl7.fhir.utilities.npm.FilesystemPackageCacheManager.FilesystemPackageCacheMode.USER).loadPackage("ihe.formatcode.fhir");
+    NpmPackage ihe = new FilesystemPackageCacheManager.Builder().build().loadPackage("ihe.formatcode.fhir");
     workerContext.loadFromPackage(ihe, new R4ToR5Loader(BuildWorkerContext.defaultTypesToLoad(), new IHELoader(), workerContext.getVersion()));
    
     Map<String, SpecMapManager> packages = new HashMap<>();
diff --git a/src/main/java/org/hl7/fhir/tools/publisher/Publisher.java b/src/main/java/org/hl7/fhir/tools/publisher/Publisher.java
index 48a78ef..74325bf 100644
--- a/src/main/java/org/hl7/fhir/tools/publisher/Publisher.java
+++ b/src/main/java/org/hl7/fhir/tools/publisher/Publisher.java
@@ -3414,7 +3414,7 @@ private void produceSpec() throws Exception {
       npm.finish();
       if (!isCIBuild) {
         String id = pidRoot()+".expansions";
-        new FilesystemPackageCacheManager(org.hl7.fhir.utilities.npm.FilesystemPackageCacheManager.FilesystemPackageCacheMode.USER).addPackageToCache(id, "current", new FileInputStream(Utilities.uncheckedPath(page.getFolders().dstDir, id + ".tgz")), Utilities.uncheckedPath(page.getFolders().dstDir, id + ".tgz"));
+        new FilesystemPackageCacheManager.Builder().build().addPackageToCache(id, "current", new FileInputStream(Utilities.uncheckedPath(page.getFolders().dstDir, id + ".tgz")), Utilities.uncheckedPath(page.getFolders().dstDir, id + ".tgz"));
       }
       
       serializeResource(expansionFeed, "expansions", false);
@@ -3571,7 +3571,7 @@ private void produceSpec() throws Exception {
       SpecNPMPackageGenerator self = new SpecNPMPackageGenerator();
       self.generate(page.getFolders().dstDir, page.getWebLocation(), false, page.getGenDate().getTime(), pidRoot());
       if (!isCIBuild) {
-        new FilesystemPackageCacheManager(org.hl7.fhir.utilities.npm.FilesystemPackageCacheManager.FilesystemPackageCacheMode.USER).addPackageToCache(pidRoot()+".core", "current", new FileInputStream(Utilities.uncheckedPath(page.getFolders().dstDir, pidRoot() + ".core.tgz")), Utilities.uncheckedPath(page.getFolders().dstDir, pidRoot() + ".core.tgz"));
+        new FilesystemPackageCacheManager.Builder().build().addPackageToCache(pidRoot()+".core", "current", new FileInputStream(Utilities.uncheckedPath(page.getFolders().dstDir, pidRoot() + ".core.tgz")), Utilities.uncheckedPath(page.getFolders().dstDir, pidRoot() + ".core.tgz"));
       }
 
       page.log(" ...zips", LogMessageType.Process);