diff --git a/buildSrc/build.gradle b/buildSrc/build.gradle
index b80ca0bb3..7e9c4587b 100644
--- a/buildSrc/build.gradle
+++ b/buildSrc/build.gradle
@@ -27,6 +27,10 @@ gradlePlugin {
             plugin.id = 'flywheel.jar-sets'
             plugin.implementationClass = 'com.jozufozu.gradle.JarSetPlugin'
         }
+        packageInfosPlugin { PluginDeclaration plugin ->
+            plugin.id = 'flywheel.package-infos'
+            plugin.implementationClass = 'com.jozufozu.gradle.PackageInfosPlugin'
+        }
     }
 }
 
diff --git a/buildSrc/src/main/groovy/GeneratePackageInfosTask.groovy b/buildSrc/src/main/groovy/com/jozufozu/gradle/GeneratePackageInfosTask.groovy
similarity index 98%
rename from buildSrc/src/main/groovy/GeneratePackageInfosTask.groovy
rename to buildSrc/src/main/groovy/com/jozufozu/gradle/GeneratePackageInfosTask.groovy
index dbb693f74..e3e34cf15 100644
--- a/buildSrc/src/main/groovy/GeneratePackageInfosTask.groovy
+++ b/buildSrc/src/main/groovy/com/jozufozu/gradle/GeneratePackageInfosTask.groovy
@@ -1,3 +1,5 @@
+package com.jozufozu.gradle
+
 import org.gradle.api.DefaultTask
 import org.gradle.api.file.DirectoryProperty
 import org.gradle.api.tasks.InputDirectory
diff --git a/buildSrc/src/main/groovy/com/jozufozu/gradle/JarSetExtension.groovy b/buildSrc/src/main/groovy/com/jozufozu/gradle/JarSetExtension.groovy
new file mode 100644
index 000000000..733761a64
--- /dev/null
+++ b/buildSrc/src/main/groovy/com/jozufozu/gradle/JarSetExtension.groovy
@@ -0,0 +1,23 @@
+package com.jozufozu.gradle
+
+import groovy.transform.CompileStatic
+import org.gradle.api.Project
+import org.gradle.api.tasks.SourceSet
+import org.gradle.api.tasks.SourceSetContainer
+
+@CompileStatic
+class JarSetExtension {
+    private final Project project
+
+    JarSetExtension(Project project) {
+        this.project = project
+    }
+
+    JarTaskSet createJars(String name) {
+        return createJars(name, project.getExtensions().getByType(SourceSetContainer).named(name).get())
+    }
+
+    JarTaskSet createJars(String name, SourceSet... sourceSetSet) {
+        return JarTaskSet.create(project, name, sourceSetSet)
+    }
+}
diff --git a/buildSrc/src/main/groovy/com/jozufozu/gradle/JarSetPlugin.groovy b/buildSrc/src/main/groovy/com/jozufozu/gradle/JarSetPlugin.groovy
index 4fc44a19a..50b572565 100644
--- a/buildSrc/src/main/groovy/com/jozufozu/gradle/JarSetPlugin.groovy
+++ b/buildSrc/src/main/groovy/com/jozufozu/gradle/JarSetPlugin.groovy
@@ -4,30 +4,12 @@ package com.jozufozu.gradle
 import groovy.transform.CompileStatic
 import org.gradle.api.Plugin
 import org.gradle.api.Project
-import org.gradle.api.tasks.SourceSet
-import org.gradle.api.tasks.SourceSetContainer
 
 @CompileStatic
 class JarSetPlugin implements Plugin<Project> {
     @Override
     void apply(Project project) {
-        project.extensions.create("jarSets", JarSetExtension, project)
+        project.extensions.create('jarSets', JarSetExtension, project)
     }
 }
 
-@CompileStatic
-class JarSetExtension {
-    private final Project project
-
-    JarSetExtension(Project project) {
-        this.project = project
-    }
-
-    JarTaskSet createJars(String name) {
-        return createJars(name, project.getExtensions().getByType(SourceSetContainer).named(name).get())
-    }
-
-    JarTaskSet createJars(String name, SourceSet... sourceSetSet) {
-        return JarTaskSet.create(project, name, sourceSetSet)
-    }
-}
diff --git a/buildSrc/src/main/groovy/com/jozufozu/gradle/PackageInfosExtension.groovy b/buildSrc/src/main/groovy/com/jozufozu/gradle/PackageInfosExtension.groovy
new file mode 100644
index 000000000..cecc3f80a
--- /dev/null
+++ b/buildSrc/src/main/groovy/com/jozufozu/gradle/PackageInfosExtension.groovy
@@ -0,0 +1,50 @@
+package com.jozufozu.gradle
+
+import groovy.transform.CompileStatic
+import org.gradle.api.Project
+import org.gradle.api.tasks.Delete
+import org.gradle.api.tasks.SourceSet
+
+@CompileStatic
+class PackageInfosExtension {
+    final Project project
+
+    PackageInfosExtension(Project project) {
+        this.project = project
+    }
+
+    void forSourceSets(SourceSet... sourceSets) {
+        for (SourceSet sourceSet : sourceSets) {
+            _forSourceSet(sourceSet)
+        }
+    }
+
+    private void _forSourceSet(SourceSet sourceSet) {
+        // We have to capture the source set name for the lazy string literals,
+        // otherwise it'll just be whatever the last source set is in the list.
+        def sourceSetName = sourceSet.name
+        def taskName = sourceSet.getTaskName('generate', 'PackageInfos')
+        def task = project.tasks.register(taskName, GeneratePackageInfosTask) {
+            it.group = 'flywheel'
+            it.description = "Generates package-info files for $sourceSetName packages."
+
+            // Only apply to default source directory since we also add the generated
+            // sources to the source set.
+            it.sourceRoot.set(project.file("src/$sourceSetName/java"))
+            it.outputDir.set(project.file("src/$sourceSetName/generatedPackageInfos"))
+        }
+        sourceSet.java.srcDir(task)
+
+        project.tasks.named('ideaSyncTask').configure {
+            it.finalizedBy(task)
+        }
+
+        def cleanTask = project.tasks.register(sourceSet.getTaskName('clean', 'PackageInfos'), Delete) {
+            it.group = 'flywheel'
+            it.delete(project.file("src/$sourceSetName/generatedPackageInfos"))
+        }
+        project.tasks.named('clean').configure {
+            it.dependsOn(cleanTask)
+        }
+    }
+}
diff --git a/buildSrc/src/main/groovy/com/jozufozu/gradle/PackageInfosPlugin.groovy b/buildSrc/src/main/groovy/com/jozufozu/gradle/PackageInfosPlugin.groovy
new file mode 100644
index 000000000..8e6435d8f
--- /dev/null
+++ b/buildSrc/src/main/groovy/com/jozufozu/gradle/PackageInfosPlugin.groovy
@@ -0,0 +1,14 @@
+package com.jozufozu.gradle
+
+import groovy.transform.CompileStatic
+import org.gradle.api.Plugin
+import org.gradle.api.Project
+
+@CompileStatic
+class PackageInfosPlugin implements Plugin<Project> {
+    @Override
+    void apply(Project target) {
+        target.extensions.create('defaultPackageInfos', PackageInfosExtension, target)
+    }
+}
+
diff --git a/buildSrc/src/main/groovy/flywheel.package-infos.gradle b/buildSrc/src/main/groovy/flywheel.package-infos.gradle
deleted file mode 100644
index 1e9392da6..000000000
--- a/buildSrc/src/main/groovy/flywheel.package-infos.gradle
+++ /dev/null
@@ -1,31 +0,0 @@
-
-sourceSets.configureEach {
-    setupGeneratePackageInfos(it)
-}
-
-def setupGeneratePackageInfos(SourceSet sourceSet) {
-    // We have to capture the source set name for the lazy string literals,
-    // otherwise it'll just be whatever the last source set is in the list.
-    def sourceSetName = sourceSet.name
-    def taskName = sourceSet.getTaskName('generate', 'PackageInfos')
-    def task = tasks.register(taskName, GeneratePackageInfosTask) {
-        group = 'flywheel'
-        description = "Generates package-info files for $sourceSetName packages."
-
-        // Only apply to default source directory since we also add the generated
-        // sources to the source set.
-        sourceRoot = file("src/$sourceSetName/java")
-        outputDir = file("src/$sourceSetName/generatedPackageInfos")
-    }
-    sourceSet.java.srcDir task
-
-    tasks.named('ideaSyncTask').configure {
-        finalizedBy task
-    }
-
-    def cleanTask = tasks.register(sourceSet.getTaskName('clean', 'PackageInfos'), Delete) {
-        group = 'flywheel'
-        delete file("src/$sourceSetName/generatedPackageInfos")
-    }
-    clean.dependsOn cleanTask
-}
diff --git a/common/build.gradle b/common/build.gradle
index 66d8d4292..0181025c8 100644
--- a/common/build.gradle
+++ b/common/build.gradle
@@ -40,6 +40,10 @@ sourceSets {
     }
 }
 
+defaultPackageInfos {
+    forSourceSets sourceSets.api, sourceSets.lib, sourceSets.backend, sourceSets.main
+}
+
 // For sharing with other subprojects.
 jarSets {
     createJars('apiOnly', sourceSets.api).configure {
diff --git a/fabric/build.gradle b/fabric/build.gradle
index 4ae964468..e975b7754 100644
--- a/fabric/build.gradle
+++ b/fabric/build.gradle
@@ -11,6 +11,10 @@ plugins {
 
 evaluationDependsOn(':common')
 
+defaultPackageInfos {
+    forSourceSets sourceSets.api, sourceSets.lib, sourceSets.backend, sourceSets.main
+}
+
 loom {
     runs {
         client {
diff --git a/forge/build.gradle b/forge/build.gradle
index b6ef3166c..97a812da3 100644
--- a/forge/build.gradle
+++ b/forge/build.gradle
@@ -11,6 +11,10 @@ plugins {
 
 evaluationDependsOn(':common')
 
+defaultPackageInfos {
+    forSourceSets sourceSets.api, sourceSets.lib, sourceSets.backend, sourceSets.main
+}
+
 loom {
     forge {
         mixinConfig 'flywheel.backend.mixins.json'