We want to build guix from source but not create native packages for all the dependencies. Therefore we will use [GNU Stow](https://www.gnu.org/software/stow/) to install the files to `/usr/local/stow` and then symlink them to `/usr/local`.

http://cdimage.ubuntu.com/releases/21.04/release/
For this, on Ubuntu 21.04, we need to install some packages:

```shell
sudo apt update
sudo apt install git stow autoconf autopoint make g++ gettext pkg-config po4a texinfo help2man guile-3.0 guile-3.0-dev libtasn1-6-dev guile-git guile-json guile-sqlite3 guile-gcrypt guile-lzlib
```

We need to compile gnutls from source to build the guile3.0 bindings

(make took 38 minutes)
```shell
cd /usr/local/src
wget https://www.gnupg.org/ftp/gcrypt/gnutls/v3.6/gnutls-3.6.16.tar.xz
wget https://www.gnupg.org/ftp/gcrypt/gnutls/v3.6/gnutls-3.6.16.tar.xz.sig
gpg --verify gnutls-3.6.16.tar.xz.sig
tar xf ../gnutls-3.6.16.tar.xz
cd gnutls-3.6.16
./configure --with-included-libtasn1 \
        --with-included-unistring \
        --without-p11-kit \
        --disable-dependency-tracking \
        --with-guile-site-dir=/usr/local/share/guile/site/3.0 \
        --with-guile-site-ccache-dir=/usr/local/lib/guile/3.0/site-ccache \
        --with-guile-extension-dir=/usr/local/lib/guile/3.0/extensions
make
sudo make install prefix=/usr/local/stow/gnutls-3.6.16
cd /usr/local/stow
sudo stow gnutls-3.6.16
```

guile-zlib is actually too old, so we build it from source
(make took 43 seconds)
```shell
cd /usr/local/src
git clone https://notabug.org/guile-zlib/guile-zlib
cd guile-zlib
git checkout v0.1.0
autoreconf -vfi
GUILE_LOAD_PATH=/usr/local/share/guile/site/3.0:$GUILE_LOAD_PATH ./configure
make
sudo make install prefix=/usr/local/stow/guile-zlib-0.1.0
ct /usr/local/stow
sudo stow guile-zlib-0.1.0
```

Then we can get started with Guix itself
```shell
git clone https://git.savannah.gnu.org/git/guix.git
cd guix
./bootstrap
GUILE_LOAD_PATH=/usr/local/share/guile/site/3.0:$GUILE_LOAD_PATH ./configure --with-courage
GUILE_LOAD_PATH=/usr/local/share/guile/site/3.0:$GUILE_LOAD_PATH make
```