diff --git a/source/hello-flake/main.adoc0 b/source/hello-flake/main.adoc0
index 8f46a58..718bcb4 100644
--- a/source/hello-flake/main.adoc0
+++ b/source/hello-flake/main.adoc0
@@ -41,9 +41,9 @@ Once we exit that shell, the `hello-flake` command is no longer
 directly available.
 
 ....
-$# echo '$ exit'
-$# echo '$ hello-flake'
-sh: line 3: hello-flake: command not found
+$# echo executable=$(which hello-flake) > temp.sh # save variable
+$ exit
+$ hello-flake     # Won't work outside development shell
 ....
 
 However, we can still run the command using the store path we found
@@ -51,7 +51,8 @@ earlier. That's not particularly convenient, but it does demonstrate
 that the package remains in the store for future use.
 
 ....
-$# executable=$(which hello-flake)
+$# source temp.sh # restore variable
+$# rm temp.sh
 $# echo '$ '${executable}
 $# ${executable}
 ....
diff --git a/source/nix-language/argument-sets.adoc b/source/nix-language/argument-sets.adoc
index 4416023..3c42b71 100644
--- a/source/nix-language/argument-sets.adoc
+++ b/source/nix-language/argument-sets.adoc
@@ -9,7 +9,10 @@ An attribute set that is used as a function parameter is often called an _argume
 To specify an attribute set as a function parameter, we use a _set pattern_,
 which has the form
 
-    { _name1_, _name2_, ... }
+[source,subs=quotes]
+----
+{ _name1_, _name2_, ... }
+----
 
 Note that while the key-value associations in attribute sets are separated by semi-colons,
 the key names in the attribute set _pattern are separated by commas.
diff --git a/source/nix-language/numbers.adoc b/source/nix-language/numbers.adoc
index d44cc91..b9f7a86 100644
--- a/source/nix-language/numbers.adoc
+++ b/source/nix-language/numbers.adoc
@@ -44,7 +44,8 @@ a path
 ....
 
 If an expression can be interpreted as a path, Nix will do so.
-This is useful, because paths are _far_ more commonly used in Nix expressions that arithmetic operators.
+This is useful, because paths are _far_ more commonly used in Nix expressions 
+than arithmetic operators.
 In this case, Nix interpreted `6/2` as a relative path from the current directory,
 which in the above example was `/home/amy/codeberg/nix-book`.