diff --git a/lib/node_modules/@stdlib/_tools/pkgs/addons/lib/inspect.js b/lib/node_modules/@stdlib/_tools/pkgs/addons/lib/inspect.js
index 94e95c36c351..7e2d9bb79afa 100644
--- a/lib/node_modules/@stdlib/_tools/pkgs/addons/lib/inspect.js
+++ b/lib/node_modules/@stdlib/_tools/pkgs/addons/lib/inspect.js
@@ -24,12 +24,23 @@ var resolve = require( 'path' ).resolve;
 var logger = require( 'debug' );
 var dirname = require( '@stdlib/utils/dirname' );
 var exists = require( '@stdlib/fs/exists' );
+var join = require( '@stdlib/array/base/join' );
 
 
 // VARIABLES //
 
 var debug = logger( 'pkgs:add-ons:resolve' );
 
+var THRESHOLD = 3;
+var FILES = [
+	[ 'src', 'Makefile' ],
+	[ 'binding.gyp' ],
+
+	// WARNING: we assume that a package does NOT have both an `addon.c` AND an `addon.cpp` file!
+	[ 'src', 'addon.c' ],
+	[ 'src', 'addon.cpp' ]
+];
+
 
 // MAIN //
 
@@ -37,12 +48,14 @@ var debug = logger( 'pkgs:add-ons:resolve' );
 * Inspects packages for add-ons.
 *
 * @private
-* @param {StringArray} files - list of `package.json` files
+* @param {ArrayLikeObject<string>} files - list of `package.json` files
 * @param {Callback} clbk - callback to invoke upon completion
 * @returns {void}
 */
 function inspect( files, clbk ) {
+	var counter;
 	var total;
+	var npass;
 	var out;
 	var i;
 
@@ -60,15 +73,20 @@ function inspect( files, clbk ) {
 	function next() {
 		var fpath;
 		var dir;
+		var j;
 
 		i += 1;
 		debug( 'Inspecting package %d of %d: %s', i+1, total, files[ i ] );
 
 		dir = dirname( files[ i ] );
-		fpath = resolve( dir, 'src', 'Makefile' );
-
+		counter = 0;
+		npass = 0;
 		debug( 'Checking for add-on...' );
-		exists( fpath, onExists );
+		for ( j = 0; j < FILES.length; j++ ) {
+			debug( 'Checking for add-on file: %s', join( FILES[ j ] ) );
+			fpath = resolve.apply( null, [ dir ].concat( FILES[ j ] ) );
+			exists( fpath, onExists );
+		}
 	}
 
 	/**
@@ -81,9 +99,21 @@ function inspect( files, clbk ) {
 	*/
 	function onExists( error, bool ) {
 		var j = i + 1;
+
+		counter += 1;
+		debug( 'Finished checking for add-on file (%d of %d).', counter, FILES.length );
 		if ( error ) {
 			debug( 'Encountered an error when testing for add-on: %s (%d of %d). Error: %s', files[ i ], j, total, error.message );
 		} else if ( bool ) {
+			debug( 'Detected add-on file.' );
+			npass += 1;
+		} else {
+			debug( 'Unable to detect add-on file.' );
+		}
+		if ( counter < FILES.length ) {
+			return;
+		}
+		if ( npass >= THRESHOLD ) {
 			debug( 'Detected add-on.' );
 			out.push( dirname( files[ i ] ) );
 		} else {
@@ -99,8 +129,7 @@ function inspect( files, clbk ) {
 	* @returns {void}
 	*/
 	function done() {
-		var j;
-		j = i + 1;
+		var j = i + 1;
 		if ( j < total ) {
 			debug( 'Inspected %d of %d packages.', j, total );
 			return next();
diff --git a/lib/node_modules/@stdlib/_tools/pkgs/addons/lib/sync.js b/lib/node_modules/@stdlib/_tools/pkgs/addons/lib/sync.js
index 2e8d92d16b2e..066753843c38 100644
--- a/lib/node_modules/@stdlib/_tools/pkgs/addons/lib/sync.js
+++ b/lib/node_modules/@stdlib/_tools/pkgs/addons/lib/sync.js
@@ -38,19 +38,18 @@ var validate = require( './validate.js' );
 * @param {Options} [options] - function options
 * @param {string} [options.dir] - root directory from which to search for add-ons
 * @param {string} [options.pattern='**\/package.json'] - glob pattern
-* @param {StringArray} [options.ignore] - glob pattern(s) to exclude matches
+* @param {ArrayLikeObject<string>} [options.ignore] - glob pattern(s) to exclude matches
 * @throws {TypeError} options argument must be an object
 * @throws {TypeError} must provide valid options
 * @throws {Error} `pattern` option must end with `package.json`
 * @throws {Error} unable to parse `package.json` as JSON
-* @returns {(EmptyArray|StringArray)} list of add-ons
+* @returns {(EmptyArray|Array<string>)} list of add-ons
 *
 * @example
 * var pkgs = findAddons();
 * // returns [...]
 */
 function findAddons( options ) {
-	var fpath;
 	var gopts;
 	var files;
 	var opts;
@@ -83,8 +82,14 @@ function findAddons( options ) {
 	out = [];
 	for ( i = 0; i < files.length; i++ ) {
 		dir = dirname( files[ i ] );
-		fpath = resolve( dir, 'src', 'Makefile' );
-		if ( exists( fpath ) ) {
+		if (
+			exists( resolve( dir, 'src', 'Makefile' ) ) &&
+			exists( resolve( dir, 'binding.gyp' ) ) &&
+			(
+				exists( resolve( dir, 'src', 'addon.c' ) ) ||
+				exists( resolve( dir, 'src', 'addon.cpp' ) )
+			)
+		) {
 			out.push( dir );
 		}
 	}