diff --git a/plugins/package-managers/cocoapods/src/main/kotlin/CocoaPods.kt b/plugins/package-managers/cocoapods/src/main/kotlin/CocoaPods.kt
index e69284367a98b..89ca744e10a62 100644
--- a/plugins/package-managers/cocoapods/src/main/kotlin/CocoaPods.kt
+++ b/plugins/package-managers/cocoapods/src/main/kotlin/CocoaPods.kt
@@ -177,7 +177,7 @@ class CocoaPods(
         return Package(
             id = id,
             authors = emptySet(),
-            declaredLicenses = podspec.license.takeUnless { it.isEmpty() }?.let { setOf(it) }.orEmpty(),
+            declaredLicenses = setOfNotNull(podspec.license.takeUnless { it.isEmpty() }),
             description = podspec.summary,
             homepageUrl = podspec.homepage,
             binaryArtifact = RemoteArtifact.EMPTY,
diff --git a/plugins/package-managers/conan/src/main/kotlin/Conan.kt b/plugins/package-managers/conan/src/main/kotlin/Conan.kt
index 93f5e8204f5e9..ef37e6e0c546e 100644
--- a/plugins/package-managers/conan/src/main/kotlin/Conan.kt
+++ b/plugins/package-managers/conan/src/main/kotlin/Conan.kt
@@ -488,5 +488,5 @@ class Conan(
      * author name; otherwise, return an empty set.
      */
     private fun parseAuthors(node: JsonNode): Set<String> =
-        parseAuthorString(node["author"]?.textValue(), '<', '(')?.let { setOf(it) }.orEmpty()
+        setOfNotNull(parseAuthorString(node["author"]?.textValue(), '<', '('))
 }
diff --git a/plugins/package-managers/stack/src/main/kotlin/Stack.kt b/plugins/package-managers/stack/src/main/kotlin/Stack.kt
index 97b7dbf56c9f8..778f0c193e05d 100644
--- a/plugins/package-managers/stack/src/main/kotlin/Stack.kt
+++ b/plugins/package-managers/stack/src/main/kotlin/Stack.kt
@@ -347,7 +347,7 @@ class Stack(
                 .map(String::trim)
                 .filter(String::isNotEmpty)
                 .mapNotNullTo(mutableSetOf(), ::parseAuthorString),
-            declaredLicenses = map["license"]?.let { setOf(it) }.orEmpty(),
+            declaredLicenses = setOfNotNull(map["license"]),
             description = map["description"].orEmpty(),
             homepageUrl = homepageUrl,
             binaryArtifact = RemoteArtifact.EMPTY,