diff --git a/mock/c6-firefox60.i386.cfg b/mock/c6-firefox60.i386.cfg
index df10354..9fb2a6e 100644
--- a/mock/c6-firefox60.i386.cfg
+++ b/mock/c6-firefox60.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 devtoolset-7-build rust-toolset-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 nss-devel nspr-devel'
 config_opts['dist'] = 'el6'  # only useful for --resultdir variable subst
 config_opts['macros']['%dist'] = ".el6"
 config_opts['%centos_ver'] = "6"
@@ -61,5 +61,10 @@ name=c6-rust-toolset-7
 enabled=1
 baseurl=http://repohost/repo/c6-rust-toolset-7.i386/
 
+[c6-firefox60.i386]
+name=c6-firefox60
+enabled=1
+baseurl=http://repohost/repo/c6-firefox60.i386/
+
 """
 
diff --git a/mock/c6-firefox60.x86_64.cfg b/mock/c6-firefox60.x86_64.cfg
index 6cd5b4e..6e3e8d7 100644
--- a/mock/c6-firefox60.x86_64.cfg
+++ b/mock/c6-firefox60.x86_64.cfg
@@ -1,7 +1,7 @@
 config_opts['root'] = 'TARGETNAME'
 config_opts['target_arch'] = 'x86_64'
 config_opts['legal_host_arches'] = ('x86_64','noarch',)
-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 devtoolset-7-build rust-toolset-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 nspr-devel nss-devel'
 config_opts['dist'] = 'el6'  # only useful for --resultdir variable subst
 config_opts['macros']['%dist'] = ".el6"
 config_opts['%centos_ver'] = "6"
@@ -62,5 +62,12 @@ name=c6-rust-toolset-7
 enabled=1
 baseurl=http://repohost/repo/c6-rust-toolset-7.x86_64/
 includepkgs=*.x86_64 *.noarch glibc.i686 glibc-rust-el.i686 nss-softokn-freebl*.i686
+
+[c6-firefox60.x86_64]
+name=c6-firefox60
+enabled=1
+baseurl=http://repohost/repo/c6-firefox60.x86_64/
+
+
 """