diff --git a/perl-Config-AutoConf.spec b/perl-Config-AutoConf.spec
index 2b5e5b8..3882444 100644
--- a/perl-Config-AutoConf.spec
+++ b/perl-Config-AutoConf.spec
@@ -1,6 +1,11 @@
+# Use File::Slurper for reading file content
+%bcond_without perl_Config_AutoConf_enables_File_Slurper
+# Use Scalar::Util for detecting numbers
+%bcond_without perl_Config_AutoConf_enables_Scalar_Util
+
 Name:           perl-Config-AutoConf
 Version:        0.319
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        A module to implement some of AutoConf macros in pure Perl
 License:        GPL+ or Artistic
 URL:            https://metacpan.org/release/Config-AutoConf
@@ -8,6 +13,7 @@ Source0:        https://cpan.metacpan.org/authors/id/R/RE/REHSACK/Config-AutoCon
 BuildArch:      noarch
 # Build
 BuildRequires:  gcc
+BuildRequires:  make
 BuildRequires:  perl-interpreter
 BuildRequires:  perl-generators
 BuildRequires:  perl(ExtUtils::MakeMaker) >= 6.76
@@ -21,9 +27,14 @@ BuildRequires:  perl(Config)
 BuildRequires:  perl(constant)
 BuildRequires:  perl(Exporter)
 BuildRequires:  perl(File::Basename)
+%if %{with perl_Config_AutoConf_enables_File_Slurper}
 BuildRequires:  perl(File::Slurper)
+%endif
 BuildRequires:  perl(File::Spec)
 BuildRequires:  perl(File::Temp)
+%if %{with perl_Config_AutoConf_enables_Scalar_Util}
+BuildRequires:  perl(Scalar::Util) >= 1.18
+%endif
 BuildRequires:  perl(Text::ParseWords)
 # Tests only
 BuildRequires:  perl(Cwd)
@@ -31,6 +42,12 @@ BuildRequires:  perl(ExtUtils::CBuilder)
 # Unused BuildRequires:  perl(IO::String)
 BuildRequires:  perl(Test::More)
 Requires:       perl(:MODULE_COMPAT_%(eval "$(/usr/bin/perl -V:version)"; echo $version))
+%if %{with perl_Config_AutoConf_enables_File_Slurper}
+Suggests:       perl(File::Slurper)
+%endif
+%if %{with perl_Config_AutoConf_enables_Scalar_Util}
+Suggests:       perl(Scalar::Util) >= 1.18
+%endif
 
 %description
 This module simulates some of the tasks autoconf macros do.  To detect
@@ -56,6 +73,10 @@ a command, a library and similar.
 %{_mandir}/man3/*
 
 %changelog
+* Tue Jan 12 2021 Petr Pisar <ppisar@redhat.com> - 0.319-2
+- Suggest File::Slurper for reading file content
+- Suggest Scalar::Util for detecting numbers
+
 * Sun Oct 04 2020 Emmanuel Seyman <emmanuel@seyman.fr> - 0.319-1
 - Update to 0.319