"virtual memory exhausted: Cannot allocate memory"

Hi folks. My build is giving me this error: “virtual memory exhausted: Cannot allocate memory”. This is happening for files that built before and have not been changed. I’m not sure where to go from here, and Google hasn’t provided me with any Travis-specific fixes, although in general it seems like people are suggesting raising the VM limit for the build. How would I do that within Travis? Thanks for any info.