diff --git a/R/find_rev.R b/R/find_rev.R
index cf3c0061..7eef7099 100644
--- a/R/find_rev.R
+++ b/R/find_rev.R
@@ -725,7 +725,7 @@ nix_build_exit_msg <- function(x) {
 }
 
 
-#' Evaluate expression in R or shell command via `nix-shell` environment
+#' Evaluate function in R or shell command via `nix-shell` environment
 #'
 #' @param expr Single R function or call, shell command, or list of them.
 #' @param program String stating where to evaluate the expression. Either `"R"`,
diff --git a/dev/build_envs.Rmd b/dev/build_envs.Rmd
index 01c39378..e918f5c4 100644
--- a/dev/build_envs.Rmd
+++ b/dev/build_envs.Rmd
@@ -823,7 +823,7 @@ This function can evaluate an shell or R expression in Nix.
 
 ```{r, function-with-nix}
 
-#' Evaluate expression in R or shell command via `nix-shell` environment
+#' Evaluate function in R or shell command via `nix-shell` environment
 #'
 #' @param expr Single R function or call, shell command, or list of them.
 #' @param program String stating where to evaluate the expression. Either `"R"`,
diff --git a/man/with_nix.Rd b/man/with_nix.Rd
index 32a1a92b..eee31038 100644
--- a/man/with_nix.Rd
+++ b/man/with_nix.Rd
@@ -2,7 +2,7 @@
 % Please edit documentation in R/find_rev.R
 \name{with_nix}
 \alias{with_nix}
-\title{Evaluate expression in R or shell command via \code{nix-shell} environment}
+\title{Evaluate function in R or shell command via \code{nix-shell} environment}
 \usage{
 with_nix(
   expr,
@@ -32,5 +32,5 @@ either \code{"simple"} (default) or \code{"verbose"}, which shows the script tha
 via \code{nix-shell}.}
 }
 \description{
-Evaluate expression in R or shell command via \code{nix-shell} environment
+Evaluate function in R or shell command via \code{nix-shell} environment
 }