docs/using: shellSession -> ShellSession

Co-authored-by: Jan Tojnar <jtojnar@gmail.com>

+5 -5
doc/using/configuration.chapter.md
···
- For allowing the build of a broken package once, you can use an environment variable for a single invocation of the nix tools:
-
```shellSession
+
```ShellSession
$ export NIXPKGS_ALLOW_BROKEN=1
```
···
- For allowing the build of an unsupported package once, you can use an environment variable for a single invocation of the nix tools:
-
```shellSession
+
```ShellSession
$ export NIXPKGS_ALLOW_UNSUPPORTED_SYSTEM=1
```
···
- To temporarily allow all unfree packages, you can use an environment variable for a single invocation of the nix tools:
-
```shellSession
+
```ShellSession
$ export NIXPKGS_ALLOW_UNFREE=1
```
···
- To temporarily allow all insecure packages, you can use an environment variable for a single invocation of the nix tools:
-
```shellSession
+
```ShellSession
$ export NIXPKGS_ALLOW_INSECURE=1
```
···
For this to work fully, you must also have this script sourced when you are logged in. Try adding something like this to your `~/.profile` file:
-
```shellSession
+
```ShellSession
#!/bin/sh
if [ -d $HOME/.nix-profile/etc/profile.d ]; then
for i in $HOME/.nix-profile/etc/profile.d/*.sh; do
+1 -1
doc/using/overlays.chapter.md
···
This overlay uses Intel's MKL library for both BLAS and LAPACK interfaces. Note that the same can be accomplished at runtime using `LD_LIBRARY_PATH` of `libblas.so.3` and `liblapack.so.3`. For instance:
-
```shellSession
+
```ShellSession
$ LD_LIBRARY_PATH=$(nix-build -A mkl)/lib:$LD_LIBRARY_PATH nix-shell -p octave --run octave
```