In the <manifestFile> tag of the pom.xml you specify to maven that it…

… should use the custom manifest

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>io.github.zukaritasu</groupId>
     <artifactId>jdialogs</artifactId>
-    <version>1.9.4</version>
+    <version>1.9.4-SNAPSHOT</version>
     <name>org.zuka.dialogs</name>
     <description>About This library allows you to use common Windows dialogs in Java.
         The library does not have support for other platforms, only Windows.</description>
@@ -43,9 +43,22 @@
     <distributionManagement>
         <repository>
             <id>github</id>
-            <name>Zukaritasu Packages</name>
+            <name>GitHub Zukaritasu Apache Maven Packages</name>
             <url>https://maven.pkg.github.com/Zukaritasu/jdialogs</url>
         </repository>
     </distributionManagement>
 
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <configuration>
+                    <archive>
+                        <manifestFile>src/main/resources/META-INF/MANIFEST.MF</manifestFile>
+                    </archive>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
 </project>