don't override GOCACHE if it's already set

diff --git a/macros.go b/macros.go
index a310a5c983df967a4db2c4b1ca6e0ac9d92ce216..da7b3d27809f5b056c1f9eb8c4dddd0b283eef2e 100644 (file)
--- a/macros.go
+++ b/macros.go
@@ -32,7 +32,7 @@
 %ifarch mips mips64 ppc64 ppc64le riscv64 s390x \
        GOARCH=${GOARCH-%{_arch}} \\\
 %endif \
-       %{?go_cachedir:GOCACHE="%{go_cachedir}"} \\\
+       %{?go_cachedir:GOCACHE="${GOCACHE-%{go_cachedir}}"} \\\
        %{?__jobs:GOMAXPROCS=%{__jobs}} \\\
        GOOS=${GOOS-linux} \\\
        /usr/bin/go