I've downloaded a source code from internet and I'm trying to build it with maven. Here is the pom.xml file that came with the source code:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">

<modelVersion>4.0.0</modelVersion>
<groupId>com.mycompany</groupId>
<artifactId>myArtifact</artifactId>
<packaging>jar</packaging>
<version>1.0-SNAPSHOT</version>
<name>myArtifact</name>
<url>http://maven.apache.org</url>
<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>2.0.2</version>
            <configuration>
                <descriptorRefs>
                    <descriptorRef>jar-with-dependencies</descriptorRef>
                </descriptorRefs>
                <archive>
                    <manifest>
                        <mainClass>myArtifact.Main</mainClass>
                    </manifest>
                </archive>
                <source>1.5</source>
                <target>1.5</target>
            </configuration>
        </plugin>
    </plugins>
</build>
<dependencies>
    <dependency>
        <groupId>postgresql</groupId>
        <artifactId>postgresql</artifactId>
        <version>8.4-701.jdbc4</version>
        <scope>compile</scope>
    </dependency>
</dependencies>
</project>

The mvn install command is generating the jar file but I'm unable to execute this file because of the missing dependencies (class not found exceptio

maven build dependencies
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