diff --git a/src/packagedcode/npm.py b/src/packagedcode/npm.py
index 8b2e7864184..5fa2292b34a 100644
--- a/src/packagedcode/npm.py
+++ b/src/packagedcode/npm.py
@@ -376,6 +376,18 @@ def update_dependencies_by_purl(
                     if '_' in metadata:
                         requirement, _extra = metadata.split('_')
 
+                if ':' in requirement and '@' in requirement:
+                    # dependencies with requirements like this are aliases and should be reported
+                    aliased_package, _, constraint = requirement.rpartition('@')
+                    _, _, aliased_package_name = aliased_package.rpartition(':')
+                    sdns, _ , sdname = aliased_package_name.rpartition('/')
+                    dep_purl = PackageURL(
+                        type=cls.default_package_type,
+                        namespace=sdns,
+                        name=sdname
+                    ).to_string()
+                    requirement = constraint
+
                 dep_package = models.DependentPackage(
                     purl=dep_purl,
                     scope=scope,
@@ -1014,13 +1026,12 @@ def parse(cls, location, package_only=False):
                         ns_name = ns_name.replace('"', '')
                     ns, _ , name = ns_name.rpartition('/')
 
-                    # sometimes constraints appear in the form of
-                    # wrap-ansi-cjs "npm:wrap-ansi@^7.0.0"
-                    if '@' in constraint:
-                        # "npm:wrap-ansi" should be appended to `name`, joined
-                        # with an "@"
-                        constraint_package, _, constraint = constraint.partition('@')
-                        name = f'{name}@{constraint_package}'
+                    if ':' in constraint and '@' in constraint:
+                        # dependencies with requirements like this are aliases and should be reported
+                        aliased_package, _, constraint = constraint.rpartition('@')
+                        _, _, aliased_package_name = aliased_package.rpartition(':')
+                        ns, _ , name = aliased_package_name.rpartition('/')
+
                     sub_dependencies.append((ns, name, constraint,))
 
                 elif line.startswith(' ' * 2):
@@ -1780,9 +1791,13 @@ def deps_mapper(deps, package, field_name, is_direct=True):
         ns, name = split_scoped_package_name(fqname)
         if not name:
             continue
-        if '@' in requirement:
-            requirement_package, _, requirement = requirement.partition('@')
-            name = f'{name}@{requirement_package}'
+
+        if ':' in requirement and '@' in requirement:
+            # dependencies with requirements like this are aliases and should be reported
+            aliased_package, _, requirement = requirement.rpartition('@')
+            _, _, aliased_package_name = aliased_package.rpartition(':')
+            ns, _ , name = aliased_package_name.rpartition('/')
+
         purl = PackageURL(type='npm', namespace=ns, name=name).to_string()
 
         # optionalDependencies override the dependencies with the same name
diff --git a/tests/packagedcode/data/npm/special_extracted_requirements/package.json.expected b/tests/packagedcode/data/npm/special_extracted_requirements/package.json.expected
index 07e89067ca4..89bb0db8d8b 100755
--- a/tests/packagedcode/data/npm/special_extracted_requirements/package.json.expected
+++ b/tests/packagedcode/data/npm/special_extracted_requirements/package.json.expected
@@ -68,7 +68,7 @@
     },
     "dependencies": [
       {
-        "purl": "pkg:npm/strip-ansi-cjs%40npm:strip-ansi",
+        "purl": "pkg:npm/strip-ansi",
         "extracted_requirement": "^6.0.1",
         "scope": "devDependencies",
         "is_runtime": false,
diff --git a/tests/packagedcode/data/npm/workspace/crystal.expected.json b/tests/packagedcode/data/npm/workspace/crystal.expected.json
index fd30da26963..09e6eece4fa 100644
--- a/tests/packagedcode/data/npm/workspace/crystal.expected.json
+++ b/tests/packagedcode/data/npm/workspace/crystal.expected.json
@@ -9960,8 +9960,8 @@
       "datasource_id": "npm_package_json"
     },
     {
-      "purl": "pkg:npm/%40localrepo/prettier2-for-jest",
-      "extracted_requirement": "npm:prettier@^2",
+      "purl": "pkg:npm/prettier",
+      "extracted_requirement": "^2",
       "scope": "devDependencies",
       "is_runtime": false,
       "is_optional": true,
@@ -9969,7 +9969,7 @@
       "is_direct": true,
       "resolved_package": {},
       "extra_data": {},
-      "dependency_uid": "pkg:npm/%40localrepo/prettier2-for-jest?uuid=fixed-uid-done-for-testing-5642512d1758",
+      "dependency_uid": "pkg:npm/prettier?uuid=fixed-uid-done-for-testing-5642512d1758",
       "for_package_uid": null,
       "datafile_path": "crystal/package.json",
       "datasource_id": "npm_package_json"
@@ -18249,8 +18249,8 @@
               "extra_data": {}
             },
             {
-              "purl": "pkg:npm/%40localrepo/prettier2-for-jest",
-              "extracted_requirement": "npm:prettier@^2",
+              "purl": "pkg:npm/prettier",
+              "extracted_requirement": "^2",
               "scope": "devDependencies",
               "is_runtime": false,
               "is_optional": true,
diff --git a/tests/packagedcode/data/npm/yarn-lock/v1-other-constraint/yarn.lock-expected b/tests/packagedcode/data/npm/yarn-lock/v1-other-constraint/yarn.lock-expected
index ac6cf2adffc..5c6d955a7eb 100644
--- a/tests/packagedcode/data/npm/yarn-lock/v1-other-constraint/yarn.lock-expected
+++ b/tests/packagedcode/data/npm/yarn-lock/v1-other-constraint/yarn.lock-expected
@@ -95,7 +95,7 @@
               "extra_data": {}
             },
             {
-              "purl": "pkg:npm/string-width-cjs%40%22npm:string-width",
+              "purl": "pkg:npm/string-width",
               "extracted_requirement": "^4.2.0",
               "scope": "dependencies",
               "is_runtime": true,
@@ -117,7 +117,7 @@
               "extra_data": {}
             },
             {
-              "purl": "pkg:npm/strip-ansi-cjs%40%22npm:strip-ansi",
+              "purl": "pkg:npm/strip-ansi",
               "extracted_requirement": "^6.0.1",
               "scope": "dependencies",
               "is_runtime": true,