diff --git a/README.md b/README.md
index 859acf9cb419441cf9b446ddfe95048356ca5062..b0edec4b340dc4291d6761fe2ed92165cdbda621 100644
--- a/README.md
+++ b/README.md
@@ -1,11 +1,13 @@
 # Installation
+
 There are two methods to install the environment which is needed for following
 the NIFTy tutorial. First, install it regularly into the home folder of your
 machine. Second, use a Docker container. The advantage of the second approach is
-that it is going to work without any problems most likely. Its downsides are:
-Root access to start the Docker container (security implications), a full Docker
-installation (security implications), you need to be familiar with Docker in
-order to get your results out of the container.
+that the chance that it runs on a variety of machines is relatively high.  The
+downsides are: You need root access to build and start the Docker container
+(security implications), a full Docker installation (security implications) and
+you need to be familiar with Docker in order to get your results out of the
+container.
 
 ## Standard
 
@@ -17,10 +19,10 @@ order to get your results out of the container.
 # apt-get install git python3-pip python3-scipy python3-matplotlib 
 ```
 
-- Install our Fouier transform package `pypocketfft`:
+- Optionally, install our Fourier transform package `ducc0`:
 
 ```
-$ pip3 install --user git+https://gitlab.mpcdf.mpg.de/mtr/pypocketfft.git
+$ pip3 install ducc0
 ```
 
 - Clone this repository:
@@ -33,15 +35,15 @@ $ git clone --recursive https://gitlab.mpcdf.mpg.de/ift/nifty_tutorial.git
 
 ```
 $ cd nifty_tutorial/nifty
-$ pip3 install --user .
+$ pip3 install .
 ```
 
 ## Docker
 
-- Build the image:
+- To build the image, run the following command inside the `nifty_tutorial`
+  folder.
 
 ```
-$ git clone https://gitlab.mpcdf.mpg.de/ift/nifty_tutorial.git
 # docker build -t niftytutorial .
 ```
 
@@ -56,4 +58,3 @@ $ git clone https://gitlab.mpcdf.mpg.de/ift/nifty_tutorial.git
 
 Run the scripts `*_solution.py` from the repository, check that they run through
 and look at the output plots.
-
diff --git a/nifty b/nifty
index b07033aa8221b419cd0e5de671a199025afcb659..55974d18cc25277d882b2f2678011ccff6cbbeec 160000
--- a/nifty
+++ b/nifty
@@ -1 +1 @@
-Subproject commit b07033aa8221b419cd0e5de671a199025afcb659
+Subproject commit 55974d18cc25277d882b2f2678011ccff6cbbeec