diff --git a/mock/c7-firefox91.i386.cfg b/mock/c7-firefox91.i386.cfg
index 4e5a412..2b0f364 100644
--- a/mock/c7-firefox91.i386.cfg
+++ b/mock/c7-firefox91.i386.cfg
@@ -1,7 +1,7 @@
 config_opts['root'] = 'TARGETNAME'
 config_opts['target_arch'] = 'i686'
 config_opts['legal_host_arches'] = ('i386', 'i486', 'i586', 'i686', 'x86_64',)
-config_opts['chroot_setup_cmd'] = 'install bash bzip2 coreutils cpio diffutils system-release findutils gawk gcc gcc-c++ grep gzip info make patch redhat-rpm-config rpm-build sed shadow-utils tar unzip util-linux which xz scl-utils-build llvm-toolset-11.0-build devtoolset-9-build rust-toolset-1.52-build'
+config_opts['chroot_setup_cmd'] = 'install bash bzip2 coreutils cpio diffutils system-release findutils gawk gcc gcc-c++ grep gzip info make patch redhat-rpm-config rpm-build sed shadow-utils tar unzip util-linux which xz scl-utils-build'
 config_opts['dist'] = 'el7'  # only useful for --resultdir variable subst
 
 config_opts['%centos_ver'] = "7"
@@ -122,6 +122,11 @@ name=c7-devtoolset-9
 enabled=1
 baseurl=http://repohost/repo/c7-devtoolset-9.i386/
 
+[c7-devtoolset-10.i386]
+name=c7-devtoolset-10
+enabled=1
+baseurl=http://repohost/repo/c7-devtoolset-10.i386/
+
 [c7-firefox91.i386]
 name=c7-firefox91
 enabled=1
diff --git a/mock/c7-firefox91.x86_64.cfg b/mock/c7-firefox91.x86_64.cfg
index 33081b1..6f0b9cb 100644
--- a/mock/c7-firefox91.x86_64.cfg
+++ b/mock/c7-firefox91.x86_64.cfg
@@ -1,7 +1,7 @@
 config_opts['root'] = 'TARGETNAME'
 config_opts['target_arch'] = 'x86_64'
 config_opts['legal_host_arches'] = ('x86_64',)
-config_opts['chroot_setup_cmd'] = 'install bash bzip2 coreutils cpio diffutils system-release findutils gawk gcc gcc-c++ grep gzip info make patch redhat-rpm-config rpm-build sed shadow-utils tar unzip util-linux which xz scl-utils-build   llvm-toolset-11.0-build rust-toolst-7-build'
+config_opts['chroot_setup_cmd'] = 'install bash bzip2 coreutils cpio diffutils system-release findutils gawk gcc gcc-c++ grep gzip info make patch redhat-rpm-config rpm-build sed shadow-utils tar unzip util-linux which xz scl-utils-build '
 config_opts['dist'] = 'el7'  # only useful for --resultdir variable subst
 
 config_opts['%centos_ver'] = "7"
@@ -136,6 +136,12 @@ enabled=1
 baseurl=http://repohost/repo/c7-devtoolset-9.x86_64/
 includepkgs=*.x86_64 *.noarch glibc.i686 glibc-devel.i686 nss-softokn-freebl*.i686
 
+[c7-devtoolset-10]
+name=c7-devtoolset-10
+enabled=1
+baseurl=http://repohost/repo/c7-devtoolset-10.x86_64/
+includepkgs=*.x86_64 *.noarch glibc.i686 glibc-devel.i686 nss-softokn-freebl*.i686
+
 [c7-llvm-toolset-11.0]
 name=c7-llvm-toolset-11.0
 enabled=1