diff --git a/libxcrypt.spec b/libxcrypt.spec
index 29037a5..41a398c 100644
--- a/libxcrypt.spec
+++ b/libxcrypt.spec
@@ -24,10 +24,34 @@
 %endif
 
 
+# Hash methods and API supported by libcrypt.
+# NEVER EVER touch this, if you do NOT know what you are doing!
+%if %{with new_api}
+%global hash_methods   glibc,strong
+%global obsolete_api   no
+%global compat_methods glibc
+%global compat_api     glibc
+%else
+%global hash_methods   all
+%global obsolete_api   glibc
+%endif
+
+
 # Needed for out-of-tree builds.
 %global _configure ../configure
 
 
+# Common configure options.
+%global common_configure_options           \\\
+  --libdir=/%{_lib}                        \\\
+  --disable-silent-rules                   \\\
+  --enable-shared                          \\\
+  --enable-static                          \\\
+  --disable-failure-tokens                 \\\
+  --srcdir=..                              \\\
+  --with-pkgconfigdir=%{_libdir}/pkgconfig
+
+
 # Add generation of HMAC checksums of the final stripped
 # binaries.  %%define with lazy globbing is used here
 # intentionally, because using %%global does not work.
@@ -179,33 +203,21 @@ discouraged.
 
 %build
 pushd %{_vpath_builddir}
+%configure                              \
+  %{common_configure_options}           \
+  --enable-hashes=%{hash_methods}       \
+  --enable-obsolete-api=%{obsolete_api}
+%make_build
+popd
 %if %{with new_api}
-%configure                     \
-  --libdir=/%{_lib}            \
-  --disable-silent-rules       \
-  --enable-shared              \
-  --enable-static              \
-  --disable-failure-tokens     \
-  --enable-hashes=strong,glibc \
-  --enable-obsolete-api=no     \
-  --srcdir=..                  \
-  --with-pkgconfigdir=%{_libdir}/pkgconfig
-%make_build
-popd
 pushd %{_vpath_builddir}-compat
-%endif
-%configure                     \
-  --libdir=/%{_lib}            \
-  --disable-silent-rules       \
-  --enable-shared              \
-  --enable-static              \
-  --disable-failure-tokens     \
-  --enable-hashes=all          \
-  --enable-obsolete-api=glibc  \
-  --srcdir=..                  \
-  --with-pkgconfigdir=%{_libdir}/pkgconfig
+%configure                              \
+  %{common_configure_options}           \
+  --enable-hashes=%{compat_methods}     \
+  --enable-obsolete-api=%{compat_api}
 %make_build
 popd
+%endif
 
 
 %install
@@ -296,6 +308,7 @@ done
 %changelog
 * Mon Oct 01 2018 Björn Esser <besser82@fedoraproject.org> - 4.2.1-3
 - Drop compat-devel package
+- Set configure options from globals
 
 * Sun Sep 30 2018 Björn Esser <besser82@fedoraproject.org> - 4.2.1-2
 - Build out-of-tree