This issue is somewhat involved to explain, so I took the lombok example from the mapstruct-examples repo and adapted a bit to create a repro which can be found here: https://github.com/dan-lind/mapstruct-lombok-example

What I have observed is that when annotating the target with @value and @builder, mapstruct is unable create a mappping when the source has properties on multiple levels, and the target has nested properties.

When building the above repro code with gradle clean build, I get these error messages

SourceTargetMapper.java:23: error: Property "testingToo" has no write accessor in NestedTarget for target name SourceTargetMapper.java:23: error: Property "testing" has no write accessor in NestedTarget for target name 

The source looks like this

@Data
public class Source {
    private String test;
    private AnotherSource testToo;
}

@Data
public class AnotherSource {
    private String test;
}

and target

@Value
@Builder
public class Target {
    NestedTarget nestedTarget;
}

@Value
@Builder
public class NestedTarget {

    Long testing;
    Long testingToo;
}

Some observations: If I remove either of the source properties, i.e.

    //private String test;
    private AnotherSource testToo;

or

    private String test;
    //private AnotherSource testToo;

and make the appropriate adjustments to the mapper, then the problem goes away.

The problem also goes away if I move the properties of the NestedTarget down to Target, i.e.

@Value
@Builder
public class Target {
    Long testing;
    Long testingToo;
}}

Please let me know if you need more information.