diff --git a/Dockerfile b/Dockerfile
index cc1653c..018e7be 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,6 +9,8 @@ ARG EXTRASMODULES=
 ARG ADDPACKAGES=
 ARG DELPACKAGES=
 
+COPY modules /src/modules
+
 RUN apk add --no-cache gcc g++ make libgcc libstdc++ git  \
        pkgconfig perl perl-net-ssleay perl-crypt-ssleay perl-lwp-protocol-https \
        perl-libwww wget gnutls gnutls-dev gnutls-utils $ADDPACKAGES && \
@@ -19,6 +21,8 @@ RUN apk add --no-cache gcc g++ make libgcc libstdc++ git  \
     # Clone the requested version
     git clone https://github.com/inspircd/inspircd.git inspircd -b $VERSION && \
     cd /src/inspircd && \
+    # Add and overwrite modules
+    { [ $(ls /src/modules/ | wc -l) -gt 0 ] && cp -r /src/modules/ /src/inspircd/src/modules/ || echo "No modules overwritten/added by repository"; } && \
     # write a little script to handle empty extra modules
     echo -e "if [ \$# -gt 0 ]; then \\n./modulemanager install \$@ \\nfi" > extras.sh && \
     /bin/sh extras.sh $EXTRASMODULES && \
diff --git a/README.md b/README.md
index d543c34..87c05dd 100644
--- a/README.md
+++ b/README.md
@@ -94,6 +94,16 @@ Available build arguments:
 docker build --build-arg "ADDPACKAGES=geoip geoip-dev pcre-dev pcre" --build-arg "CONFIGUREARGS=--enable-extras=m_geoip.cpp --enable-extras=m_regex_pcre.cpp"  --build-arg "EXTRASMODULES=m_geoipban" inspircd-docker
 ```
 
+## Building additional modules
+
+In case you want to develop inspircd it is useful to run inspircd with modules which neither exist in core modules nor in extras.
+
+You can put the sources those modules in the modules directory of this repository. They are automatically copied to the modules directory of inspircd.
+
+It also allows you to overwrite modules.
+
+Make sure you install all needed depenencies using `ADDPACKAGES`.
+
 # License
 
 View [license information](https://github.com/inspircd/inspircd) for the software contained in this image.
diff --git a/modules/.stay b/modules/.stay
new file mode 100644
index 0000000..e69de29