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-rw-r--r--docs/source/markdown/podman-build.1.md8
1 files changed, 8 insertions, 0 deletions
diff --git a/docs/source/markdown/podman-build.1.md b/docs/source/markdown/podman-build.1.md
index 24093d414..8fcfe555e 100644
--- a/docs/source/markdown/podman-build.1.md
+++ b/docs/source/markdown/podman-build.1.md
@@ -650,6 +650,10 @@ If --userns-gid-map-group is specified, but --userns-uid-map-user is not
specified, `podman` will assume that the specified group name is also a
suitable user name to use as the default setting for this option.
+**NOTE:** When this option is specified by a rootless user, the specified
+mappings are relative to the rootless usernamespace in the container, rather
+than being relative to the host as it would be when run rootful.
+
#### **--userns-gid-map-group**=*group*
Specifies that a GID mapping which should be used to set ownership, at the
@@ -661,6 +665,10 @@ If --userns-uid-map-user is specified, but --userns-gid-map-group is not
specified, `podman` will assume that the specified user name is also a
suitable group name to use as the default setting for this option.
+**NOTE:** When this option is specified by a rootless user, the specified
+mappings are relative to the rootless usernamespace in the container, rather
+than being relative to the host as it would be when run rootful.
+
#### **--uts**=*how*
Sets the configuration for UTS namespaces when the handling `RUN` instructions.