dnl Check for <linux/fs.h> (for immutable file support).
AC_CHECK_HEADERS([linux/fs.h])
- dnl Determine the appropriate default list of substitute URLs.
- GUILE_MODULE_AVAILABLE([have_gnutls], [(gnutls)])
- if test "x$have_gnutls" = "xyes"; then
- guix_substitute_urls="https://mirror.hydra.gnu.org"
- else
- AC_MSG_WARN([GnuTLS is missing, substitutes will be downloaded in the clear])
- guix_substitute_urls="http://mirror.hydra.gnu.org"
- fi
+ dnl Determine the appropriate default list of substitute URLs (GnuTLS
+ dnl is required so we can default to 'https'.)
+ guix_substitute_urls="https://mirror.hydra.gnu.org"
+
AC_MSG_CHECKING([for default substitute URLs])
AC_MSG_RESULT([$guix_substitute_urls])