I had an external .jar that cannot be imported from public repositories using pom.xml, it's XPTO.jar.

I was able to run the project locally from my IDE and everything worked perfectly. Refer to the library after downloading it as follows:

<dependency>

    <groupId>com.xpto.lib</groupId>

    <artifactId>XPTO</artifactId>

    <version>1.0</version>

    <scope>system</scope>

    <systemPath>${basedir}/lib/XPTO.jar</systemPath>

</dependency>

When I run mvn clean package to create my .jar file and try to run the created .jar, an error will pop up.

I was facing this error and about getting crazy before finding this solution.

Miracle Solution 🙆‍♂️🙆‍♀️

In your pom.xml just add this <includeSystemScope>true</includeSystemScope> like this

<plugins>

    <plugin>

        <groupId>org.springframework.boot</groupId>

        <artifactId>spring-boot-maven-plugin</artifactId>

        <configuration>

            <classifier>exec</classifier>

            <includeSystemScope>true</includeSystemScope>

        </configuration>

    </plugin>

</plugins>

The IDE can easily see the scope of the system by default, however when generating our build we have to force the maven to see this same scope.