diff --git a/Dockerfile b/Dockerfile
index 3eaed7e..50d71c8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,10 +6,13 @@ LABEL org.opencontainers.image.authors="Carlos Mogas da Silva <r3pek@r3pek.org>"
       maintainer="Carlos Mogas da Silva <r3pek@r3pek.org>"
 
 RUN dnf update -y && dnf upgrade -y; \
-    dnf install -y mock rpmdevtools jq; \
+    dnf install -y mock rpmdevtools jq nosync; \
     dnf clean all && rm -rf /var/cache/dnf/*
 
 COPY entrypoint.sh /
 RUN chmod +x /entrypoint.sh
+
+COPY site-defaults.cfg /etc/mock/
+
 ENTRYPOINT ["/entrypoint.sh"]
 
diff --git a/entrypoint.sh b/entrypoint.sh
index 7386912..0b6636d 100644
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -10,6 +10,9 @@ SYSTEM=${INPUT_SYSTEM}
 ARCH=${INPUT_ARCH}
 NOCHECK=${INPUT_NOCHECK}
 
+rm -rf /var/lib/mock/*
+mount -t tmpfs tmpfs /var/lib/mock
+
 RESULT="rpms=["
 
 for SPEC in ${SPECS[@]}; do
diff --git a/site-defaults.cfg b/site-defaults.cfg
new file mode 100644
index 0000000..035a342
--- /dev/null
+++ b/site-defaults.cfg
@@ -0,0 +1,3 @@
+config_opts['nosync'] = True
+config_opts['plugin_conf']['root_cache_opts']['compress_program'] = ""
+config_opts['plugin_conf']['root_cache_opts']['extension'] = ""