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-rw-r--r--lib/spack/docs/environments.rst2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/spack/docs/environments.rst b/lib/spack/docs/environments.rst
index 79382ab9ac..dbc1e23bf4 100644
--- a/lib/spack/docs/environments.rst
+++ b/lib/spack/docs/environments.rst
@@ -363,7 +363,7 @@ to ``spack install`` on the command line, ``--no-add`` is the default,
while for dependency specs on the other hand, it is optional. In other
words, if there is an unambiguous match in the active concrete environment
for a root spec provided to ``spack install`` on the command line, spack
-does not require you to specify the ``--no-add` option to prevent the spec
+does not require you to specify the ``--no-add`` option to prevent the spec
from being added again. At the same time, a spec that already exists in the
environment, but only as a dependency, will be added to the environment as a
root spec without the ``--no-add`` option.