build: Improve documentation of Nix-related options.
* configure.ac: Add documentation for --with-nix and --with-nixpkgs.
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@ -62,7 +62,8 @@ GUIX_CHECK_SRFI_37
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AM_CONDITIONAL([INSTALL_SRFI_37], [test "x$ac_cv_guix_srfi_37_broken" = xyes])
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AM_CONDITIONAL([INSTALL_SRFI_37], [test "x$ac_cv_guix_srfi_37_broken" = xyes])
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AC_ARG_WITH([nix-prefix],
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AC_ARG_WITH([nix-prefix],
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[AS_HELP_STRING([--with-nix-prefix=DIR], [search for Nix in DIR])],
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[AS_HELP_STRING([--with-nix-prefix=DIR],
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[search for Nix in DIR (for testing purposes and '--disable-daemon' builds)])],
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[case "$withval" in
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[case "$withval" in
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yes|no) ;;
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yes|no) ;;
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*)
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*)
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@ -86,7 +87,8 @@ if test "x$NIX_INSTANTIATE" = "x"; then
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fi
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fi
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AC_ARG_WITH([nixpkgs],
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AC_ARG_WITH([nixpkgs],
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[AS_HELP_STRING([--with-nixpkgs=DIR], [search for Nixpkgs in DIR])],
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[AS_HELP_STRING([--with-nixpkgs=DIR],
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[search for Nixpkgs in DIR (for testing purposes only)])],
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[case "$withval" in
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[case "$withval" in
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yes|no) AC_MSG_ERROR([Please use `--with-nixpkgs=DIR'.]);;
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yes|no) AC_MSG_ERROR([Please use `--with-nixpkgs=DIR'.]);;
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*) NIXPKGS="$withval";;
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*) NIXPKGS="$withval";;
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