Ensure `SPEC_ROOT` is expanded.
Ensure `SPEC_ROOT` is expanded.

Our absolute dir spec depends on this.
davidbebb/vcr,cemo/vcr,ZmagoD/vcr,Shopify/vcr,mcfiredrill/vcr,intfrr/vcr,Shopify/vcr,chriswoodrich/vcr,ZmagoD/vcr,allyapp/vcr,davidbebb/vcr,irfanah/vcr,mcfiredrill/vcr,intfrr/vcr,irfanah/vcr,allyapp/vcr,asymmetric/vcr,nishanbose/vcr,cemo/vcr,ihassin/vcr,ihassin/vcr,asymmetric/vcr,chriswoodrich/vcr,nishanbose/vcr