Only install to custom folder

Question

I have a multimodule project in maven. I want the modules to be installed in the repository location I want. I want to also keep outside generated dependencies in the main .m2 folder.

Then my idea is to use something like this to include my project generated dependencies.

<repositories>
    <!--other repositories if any-->
    <repository>
        <id>project.local</id>
        <name>project</name>
       <url>file:${project.basedir}/repo</url>
   </repository>
</repositories>

I have tried maven-install-plugin but it installs my generated modules to both the main local and the project repo.

Can you give me any advice on how to do so?

Edit: Include maven-install-plugin configuration that is not working properly as it installs in both local and project repository

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-install-plugin</artifactId>
    <version>2.5.2</version>
    <executions>
        <execution>
            <id>install-jar-lib</id>
            <goals>
              <goal>install-file</goal>
            </goals>
            <phase>install</phase>
            <configuration>
              <file>${project.build.directory}/${project.build.finalName}.jar</file>
              <generatePom>false</generatePom>
              <pomFile>pom.xml</pomFile>
              <packaging>jar</packaging>
              <version>0.0.1-SNAPSHOT</version>
              <skip>true</skip>
              <localRepositoryPath>./mylocalrepo</localRepositoryPath>    
            </configuration>    
        </execution>
    </executions>
</plugin>