diff --git a/ldns.spec b/ldns.spec
index 6cc4d4f..4f1a418 100644
--- a/ldns.spec
+++ b/ldns.spec
@@ -20,9 +20,7 @@
 
 %{?!snapshot:         %global snapshot        0}
 
-%if %{with python2}%{with python3}
-%{!?python_sitelib: %global python_sitelib %(%{__python} -c "from distutils.sysconfig import get_python_lib; print get_python_lib()")}
-%{!?python_sitearch: %global python_sitearch %(%{__python} -c "from distutils.sysconfig import get_python_lib; print get_python_lib(1)")}
+%if %{with python2} || %{with python3}
 %{?filter_setup:
 %global _ldns_internal_filter /^_ldns[.]so.*/d;
 %filter_from_requires %{_ldns_internal_filter}
@@ -41,7 +39,7 @@
 Summary: Low-level DNS(SEC) library with API
 Name: ldns
 Version: 1.7.0
-Release: 19%{?dist}
+Release: 20%{?dist}
 
 License: BSD
 Url: http://www.nlnetlabs.nl/%{name}/
@@ -58,6 +56,7 @@ BuildRequires: autoconf
 BuildRequires: automake
 %endif
 
+BuildRequires: gcc, make
 BuildRequires: libpcap-devel
 %if %{with dane_ta}
 BuildRequires: openssl-devel >= 1.1.0
@@ -233,7 +232,7 @@ pushd %{pkgname}
   --with-examples \
   --with-drill \
 %if %{with python3}
-  --with-pyldns PYTHON_VERSION=3
+  --with-pyldns PYTHON=%{__python3}
 %endif
 
 make %{?_smp_mflags}
@@ -256,7 +255,7 @@ popd
   pushd %{pkgname}_python2
   %configure \
     %{common_args} \
-    --with-pyldns PYTHON_VERSION=2
+    --with-pyldns PYTHON=%{__python2}
 
   make %{?_smp_mflags}
   popd
@@ -305,9 +304,7 @@ rm doc/doxyparse.pl
 # remove double set of man pages
 rm -rf doc/man
 
-%post -p /sbin/ldconfig
-
-%postun -p /sbin/ldconfig
+%ldconfig_scriptlets
 
 %files
 %doc README
@@ -356,6 +353,9 @@ rm -rf doc/man
 %doc doc
 
 %changelog
+* Tue Jul 10 2018 Petr Menšík <pemensik@redhat.com> - 1.7.0-20
+- Add all depends, spec cleanup, use full python interpreter
+
 * Tue Jul 03 2018 Petr Pisar <ppisar@redhat.com> - 1.7.0-19
 - Perl 5.28 rebuild