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Diffstat (limited to 'doc/manual/command-ref/conf-file.xml')
| -rw-r--r-- | doc/manual/command-ref/conf-file.xml | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/doc/manual/command-ref/conf-file.xml b/doc/manual/command-ref/conf-file.xml index 69295fafce84..d2c9145e0505 100644 --- a/doc/manual/command-ref/conf-file.xml +++ b/doc/manual/command-ref/conf-file.xml @@ -268,7 +268,12 @@ flag, e.g. <literal>--option gc-keep-outputs false</literal>.</para> to mount a path in a different location in the sandbox; for instance, <literal>/bin=/nix-bin</literal> will mount the path <literal>/nix-bin</literal> as <literal>/bin</literal> inside the - sandbox.</para> + sandbox. If <replaceable>source</replaceable> is followed by + <literal>?</literal>, then it is not an error if + <replaceable>source</replaceable> does not exist; for example, + <literal>/dev/nvidiactl?</literal> specifies that + <filename>/dev/nvidiactl</filename> will only be mounted in the + sandbox if it exists in the host filesystem.</para> <para>Depending on how Nix was built, the default value for this option may be empty or provide <filename>/bin/sh</filename> as a |