diff --git a/nbdkit.spec b/nbdkit.spec
index 388e2d8..5ae7ef0 100644
--- a/nbdkit.spec
+++ b/nbdkit.spec
@@ -44,8 +44,8 @@ ExclusiveArch:  x86_64
 %global source_directory 1.21-development
 
 Name:           nbdkit
-Version:        1.21.11
-Release:        2%{?dist}
+Version:        1.21.12
+Release:        1%{?dist}
 Summary:        NBD server
 
 License:        BSD
@@ -641,6 +641,7 @@ autoreconf -i
     PYTHON=%{_bindir}/python3 \
     --disable-static \
     --disable-golang \
+    --disable-rust \
 %if 0%{?have_ocaml}
     --enable-ocaml \
 %else
@@ -666,10 +667,6 @@ make %{?_smp_mflags}
 # Delete libtool crap.
 find $RPM_BUILD_ROOT -name '*.la' -delete
 
-# If cargo happens to be installed on the machine then the
-# rust plugin is built.  Delete it if this happens.
-rm -f $RPM_BUILD_ROOT%{_mandir}/man3/nbdkit-rust-plugin.3*
-
 # Remove the deprecated ext2 plugin (use ext2 filter instead).
 rm $RPM_BUILD_ROOT%{_libdir}/%{name}/plugins/nbdkit-ext2-plugin.so
 rm $RPM_BUILD_ROOT%{_mandir}/man1/nbdkit-ext2-plugin.1*
@@ -1012,6 +1009,10 @@ make %{?_smp_mflags} check || {
 
 
 %changelog
+* Tue Jun 23 2020 Richard W.M. Jones <rjones@redhat.com> - 1.21.12-1
+- New upstream development version 1.21.12.
+- Use new --disable-rust configure option.
+
 * Mon Jun 22 2020 Jitka Plesnikova <jplesnik@redhat.com> - 1.21.11-2
 - Perl 5.32 rebuild
 
diff --git a/sources b/sources
index 0c52e35..dded95c 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-SHA512 (nbdkit-1.21.11.tar.gz) = 15717e7ca7951f6bf9bedf9d1bc563864c20d5177ae112f549dd80195574a53a6a0d0cfbfbc296cc7d04889c6925d01f12b71ba9f5d659becfb312c0f9f8528c
-SHA512 (nbdkit-1.21.11.tar.gz.sig) = e37ccc9edb521dd808071e7467c1aee84f54c5972290fe2c4923cf231204002e07883cd8fec4d77db1cd2f0568fc1943db3b3fa61cc18ae8bd7515d46389c0e7
+SHA512 (nbdkit-1.21.12.tar.gz) = a35fe5738f7b5c5568a3220ed2564be1815b1e229730a37f016bc5012b115d4e531c6aada1b3b7cfd01f269b523c01ed6c25208d1b48303d7b39897b797deae2
+SHA512 (nbdkit-1.21.12.tar.gz.sig) = 097261f2b48d6a269029f291fb9527d22662a84d5d051efff61255fde5550e34f144dd1acc397ecd679ea3aa8a630d8c228fa37ee7a4bab0d0bd899ca689df9b