gsl/gsl-2.5-1-x86_64.pkg.tar.xz build reproducible in our test framework:
5d58700c2e8127b0c162dca54ebf4bdef56946f2cb23c0a1d441ef5a13c80d0a gsl-2.5-1-x86_64.pkg.tar.xz
dc483364c3f28bf27402c4e3c68a5ad1c90b3234cb14b05fdfd04fa42b2c1f41 gsl-2.5-1-x86_64.pkg.tar.xz-b1.BUILDINFO.txt
dc483364c3f28bf27402c4e3c68a5ad1c90b3234cb14b05fdfd04fa42b2c1f41 gsl-2.5-1-x86_64.pkg.tar.xz-b2.BUILDINFO.txt