diff --git a/.husky/pre-commit b/.husky/pre-commit
index 46d9e90..b9b7350 100755
--- a/.husky/pre-commit
+++ b/.husky/pre-commit
@@ -1,2 +1,3 @@
 npx pnpm lint
 npx pnpm format:check
+npx pnpm test
diff --git a/packages/project/src/compiler/index.ts b/packages/project/src/compiler/index.ts
index d110096..8079ea5 100644
--- a/packages/project/src/compiler/index.ts
+++ b/packages/project/src/compiler/index.ts
@@ -59,7 +59,8 @@ function readProjectTsconfig(
     system: ts.System,
     projectPath: string,
     outDir: string,
-    logger: Logger
+    logger: Logger,
+    validateProjectTsCfg: boolean = true
 ): Record<string, unknown> {
     const tsconfig = ts.findConfigFile("./", system.fileExists, "tsconfig.json");
     if (!tsconfig) {
@@ -73,7 +74,9 @@ function readProjectTsconfig(
     }
 
     configJsonFile.config.compilerOptions ??= {};
-    validateProjectTsconfig(configJsonFile.config.compilerOptions, outDir);
+    if (validateProjectTsCfg) {
+        validateProjectTsconfig(configJsonFile.config.compilerOptions, outDir);
+    }
     return configJsonFile.config;
 }
 
@@ -159,6 +162,7 @@ export async function compileProjectTsconfig(
  * @param projectPath Path to the project directory (should contain tsconfig.json)
  * @param logger Logger for outputting messages and diagnostics
  * @param noCheck If true, compiles without type checking, emitting JavaScript even if there are type errors
+ * @param validateProjectTsCfg If true, validates the project's tsconfig.json
  * @param tsLibsPath Optional path to TypeScript libraries (lib.d.ts, etc.), defaults to the directory of the installed TypeScript package
  * @returns Promise that resolves to true if compilation succeeded
  */
@@ -167,13 +171,20 @@ export async function compileProjectPath(
     projectPath: string,
     logger: Logger,
     noCheck: boolean = false,
+    validateProjectTsCfg: boolean = true,
     tsLibsPath: string = path.dirname(
         fileURLToPath(import.meta.resolve?.("typescript") ?? "typescript")
     )
 ): Promise<boolean> {
     const outDir = "build";
     const system = tsvfs.createSystem(fs, projectPath);
-    const configJson = readProjectTsconfig(system, projectPath, outDir, logger);
+    const configJson = readProjectTsconfig(
+        system,
+        projectPath,
+        outDir,
+        logger,
+        validateProjectTsCfg
+    );
 
     return await compileProjectTsconfig(configJson, system, logger, noCheck, tsLibsPath);
 }
diff --git a/packages/project/src/registry.ts b/packages/project/src/registry.ts
index 7467ba5..d5c0d32 100644
--- a/packages/project/src/registry.ts
+++ b/packages/project/src/registry.ts
@@ -78,10 +78,14 @@ export class Registry {
     constructor(
         registryUri: string[] | undefined,
         public getRequest: RequestFunction,
-        logger: Logger
+        logger: Logger,
+        userRegistry?: string
     ) {
         this.registryUri = registryUri || DefaultRegistryUrl;
         this.logger = logger;
+        if (userRegistry) {
+            this.registryUri.unshift(userRegistry);
+        }
     }
 
     // return list of objects with id and description of all packages in the registry, excluding templates
diff --git a/packages/tools/src/commands/lib-build.ts b/packages/tools/src/commands/lib-build.ts
index cdd3707..2a86a28 100644
--- a/packages/tools/src/commands/lib-build.ts
+++ b/packages/tools/src/commands/lib-build.ts
@@ -6,7 +6,7 @@ import { logger } from "../logger.js";
 const cmd = new Command("List libraries from project package.json", {
     action: async (options: Record<string, string | boolean>) => {
         const noCheck = options["no-check"] as boolean;
-        if (await compileProjectPath(fs, process.cwd(), logger, noCheck)) {
+        if (await compileProjectPath(fs, process.cwd(), logger, noCheck, false)) {
             logger.info("Compiled successfully\n");
         } else {
             logger.error("Compilation failed\n");
diff --git a/packages/tools/src/commands/lib-install.ts b/packages/tools/src/commands/lib-install.ts
index 5e355d8..1dc8909 100644
--- a/packages/tools/src/commands/lib-install.ts
+++ b/packages/tools/src/commands/lib-install.ts
@@ -1,4 +1,4 @@
-import { Arg, Command } from "./lib/command.js";
+import { Arg, Command, Opt } from "./lib/command.js";
 import fs from "fs";
 import { uriRequest } from "../util.js";
 import path from "path";
@@ -8,13 +8,15 @@ import { Registry } from "@jaculus/project/registry";
 import { logger } from "../logger.js";
 
 const cmd = new Command("Install Jaculus libraries base on project's package.json", {
-    action: async (_options: Record<string, string | boolean>, args: Record<string, string>) => {
+    action: async (options: Record<string, string | boolean>, args: Record<string, string>) => {
         const libraryName = args["library"] as string;
+        const userRegistry = options["user-registry"] as string | undefined;
         const projectPath = process.cwd();
 
         const pkg = await loadPackageJson(fs, path.join(projectPath, "package.json"));
         const project = new Project(fs, projectPath, logger);
-        const registry = new Registry(pkg.jaculus?.registry, uriRequest, logger);
+
+        const registry = new Registry(pkg.jaculus?.registry, uriRequest, logger, userRegistry);
 
         const { name, version } = splitLibraryNameVersion(libraryName);
         if (name && version) {
@@ -32,6 +34,14 @@ const cmd = new Command("Install Jaculus libraries base on project's package.jso
             { defaultValue: "" }
         ),
     ],
+    options: {
+        "user-registry": new Opt(
+            `Preferred registry URI. If a package exists in multiple registries, this one is used first.`,
+            {
+                required: false,
+            }
+        ),
+    },
     chainable: true,
 });
 
diff --git a/test/project/compiler.test.ts b/test/project/compiler.test.ts
index d3f65cf..f980380 100644
--- a/test/project/compiler.test.ts
+++ b/test/project/compiler.test.ts
@@ -87,6 +87,7 @@ describe("TypeScript Compiler", () => {
                     testData.inputPath,
                     logger,
                     undefined,
+                    true,
                     testData.tsLibsPath
                 );