diff --git a/lib/node_modules/@stdlib/_tools/pkgs/deps/lib/sync.js b/lib/node_modules/@stdlib/_tools/pkgs/deps/lib/sync.js
index bcd54eff93b8..472225d17d9e 100644
--- a/lib/node_modules/@stdlib/_tools/pkgs/deps/lib/sync.js
+++ b/lib/node_modules/@stdlib/_tools/pkgs/deps/lib/sync.js
@@ -55,10 +55,10 @@ var debug = logger( 'pkg-deps:sync' );
 * @returns {ObjectArray} resolved dependencies
 *
 * @example
-* var pkgs = [ '/foo/bar/baz' ];
+* var pkgs = [ '/path/to/package' ];
 *
 * var deps = pkgDeps( pkgs );
-* // returns [{...}]
+* // throws <Error>
 */
 function pkgDeps( pkgs, options ) {
 	var results;
diff --git a/lib/node_modules/@stdlib/math/base/special/roundn/src/addon.c b/lib/node_modules/@stdlib/math/base/special/roundn/src/addon.c
index e968d8c03a81..d636a9b7df48 100644
--- a/lib/node_modules/@stdlib/math/base/special/roundn/src/addon.c
+++ b/lib/node_modules/@stdlib/math/base/special/roundn/src/addon.c
@@ -19,4 +19,4 @@
 #include "stdlib/math/base/special/roundn.h"
 #include "stdlib/math/base/napi/binary.h"
 
-STDLIB_MATH_BASE_NAPI_MODULE_DI_D( stdlib_base_roundn )
+STDLIB_MATH_BASE_NAPI_MODULE_D_D( stdlib_base_roundn );
diff --git a/lib/node_modules/@stdlib/number/float32/base/exponent/manifest.json b/lib/node_modules/@stdlib/number/float32/base/exponent/manifest.json
index c1b80d501b69..fb5d77debcec 100644
--- a/lib/node_modules/@stdlib/number/float32/base/exponent/manifest.json
+++ b/lib/node_modules/@stdlib/number/float32/base/exponent/manifest.json
@@ -1,42 +1,42 @@
 {
-	"options": {},
-	"fields": [
-		{
-			"field": "src",
-			"resolve": true,
-			"relative": true
-		},
-		{
-			"field": "include",
-			"resolve": true,
-			"relative": true
-		},
-		{
-			"field": "libraries",
-			"resolve": false,
-			"relative": false
-		},
-		{
-			"field": "libpath",
-			"resolve": true,
-			"relative": false
-		}
-	],
-	"confs": [
-		{
-			"src": [
-				"./src/main.c"
-			],
-			"include": [
-				"./include"
-			],
-			"libraries": [],
-			"libpath": [],
-			"dependencies": [
-				"@stdlib/constants/float32/exponent-bias",
-				"@stdlib/constants/float32/exponent-mask",
-				"@stdlib/number/float32/base/to-word"
-			]
-		}
-	]
+    "options": {},
+    "fields": [
+        {
+            "field": "src",
+            "resolve": true,
+            "relative": true
+        },
+        {
+            "field": "include",
+            "resolve": true,
+            "relative": true
+        },
+        {
+            "field": "libraries",
+            "resolve": false,
+            "relative": false
+        },
+        {
+            "field": "libpath",
+            "resolve": true,
+            "relative": false
+        }
+    ],
+    "confs": [
+        {
+            "src": [
+                "./src/main.c"
+            ],
+            "include": [
+                "./include"
+            ],
+            "libraries": [],
+            "libpath": [],
+            "dependencies": [
+                "@stdlib/constants/float32/exponent-bias",
+                "@stdlib/constants/float32/exponent-mask",
+                "@stdlib/number/float32/base/to-word"
+            ]
+        }
+    ]
 }
diff --git a/lib/node_modules/@stdlib/utils/get-prototype-of/lib/polyfill.js b/lib/node_modules/@stdlib/utils/get-prototype-of/lib/polyfill.js
index 4693932eccfe..4139f7ac72b0 100644
--- a/lib/node_modules/@stdlib/utils/get-prototype-of/lib/polyfill.js
+++ b/lib/node_modules/@stdlib/utils/get-prototype-of/lib/polyfill.js
@@ -21,6 +21,7 @@
 // MODULES //
 
 var nativeClass = require( '@stdlib/utils/native-class' );
+var Object = require( '@stdlib/object/ctor' );
 var getProto = require( './proto.js' );
 
 
@@ -42,7 +43,7 @@ function getPrototypeOf( obj ) {
 		// May break if the constructor has been tampered with...
 		return obj.constructor.prototype;
 	}
-	if ( obj instanceof Object ) {
+	if ( Object.prototype.isPrototypeOf(obj) ) {
 		return Object.prototype;
 	}
 	// Return `null` for objects created via `Object.create( null )`. Also return `null` for cross-realm objects on browsers that lack `__proto__` support, such as IE < 11.
diff --git a/tools/make/lib/test-cov/c8.mk b/tools/make/lib/test-cov/c8.mk
index 5f152ff08661..702fdcc32ac3 100644
--- a/tools/make/lib/test-cov/c8.mk
+++ b/tools/make/lib/test-cov/c8.mk
@@ -47,7 +47,8 @@ C8_EXCLUDES_FLAGS = \
 	-x "**/$(EXAMPLES_FOLDER)/**" \
 	-x "**/$(BENCHMARKS_FOLDER)/**" \
 	-x "**/$(CONFIG_FOLDER)/**" \
-	-x "**/$(DOCUMENTATION_FOLDER)/**"
+	-x "**/$(DOCUMENTATION_FOLDER)/**" \
+	-x 'custom_folder/**'
 
 # Define command-line options when generating coverage data:
 C8_FLAGS = \
@@ -55,7 +56,8 @@ C8_FLAGS = \
 	--clean=false \
 	--temp-directory $(COVERAGE_DIR)/tmp \
 	--report-dir $(COVERAGE_DIR) \
-	--reporter lcov
+	--reporter lcov \
+	--100
 
 
 # RULES #