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diff --git a/doc/gensquashfs.1 b/doc/gensquashfs.1
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@@ -157,13 +157,19 @@ file /bin/bash 0755 0 0
file "/opt/my app/\\"special\\"/data" 0600 0 0
.fi
.in
-.SH ENVIRONEMNT VARIABLES
+.SH ENVIRONMENT
If the command line switch \fB\-\-defaults\fR is not used or no default mtime
is specified, the value of the environment variable \fBSOURCE\_DATE\_EPOCH\fR
is used for all file and filesystem timestamps.
If \fBSOURCE\_DATE\_EPOCH\fR is not set, not a parsable number or it is out of
range, the timestamps default to 0.
+
+Environment variables are only used if no explicit command line switches
+are set. Explicit command line switches are always preferred over the
+environment variables.
+.SH SEE ALSO
+rdsquashfs(1), tar2sqfs(1)
.SH AUTHOR
Written by David Oberhollenzer.
.SH COPYRIGHT