bug#35616: go-github-com-spf13-pflag build fails

[Maxim Cournoyer]

On master:

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starting phase `check'
go: disabling cache (/homeless-shelter/.cache/go-build) due to initialization 
failure: mkdir /homeless-shelter: permission denied
# github.com/spf13/pflag
src/github.com/spf13/pflag/bool_test.go:175: T.Errorf format %s has arg b of 
wrong type *bool
src/github.com/spf13/pflag/bool_test.go:178: T.Errorf format %s has arg c of 
wrong type *bool
FAIL    github.com/spf13/pflag [build failed]
Backtrace:
           5 (primitive-load "/gnu/store/c32i7lg8amk32c7f2ilarwyc3ip…")
In ice-9/eval.scm:
   191:35  4 (_ #f)
In srfi/srfi-1.scm:
   863:16  3 (every1 #<procedure 714a80 at /gnu/store/zmc0hcmdfg5n4…> …)
In 
/gnu/store/zmc0hcmdfg5n4kl32vcla4cg9c9bspfg-module-import/guix/build/gnu-build-system.scm:
   799:28  2 (_ _)
In 
/gnu/store/zmc0hcmdfg5n4kl32vcla4cg9c9bspfg-module-import/guix/build/go-build-system.scm:
    230:4  1 (check #:tests? _ #:import-path _)
In 
/gnu/store/zmc0hcmdfg5n4kl32vcla4cg9c9bspfg-module-import/guix/build/utils.scm:
    616:6  0 (invoke _ . _)

/gnu/store/zmc0hcmdfg5n4kl32vcla4cg9c9bspfg-module-import/guix/build/utils.scm:616:6:
 In procedure invoke:
Throw to key `srfi-34' with args `(#<condition &invoke-error [program: "go" 
arguments: ("test" "github.com/spf13/pflag") exit-status: 2 term-signal: #f 
stop-signal: #f] 885f80>)'.
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