add missing defaults that made me go on a pointless tangent elsewhere…

… (smh)

modules/HM/nushell/env.nu

@@ -4,3 +4,31 @@ $env.TRANSIENT_PROMPT_COMMAND = ""
 
 # connect SSH agent (depends on a systemd service).
 $env.SSH_AUTH_SOCK = $"($env.XDG_RUNTIME_DIR)ssh-agent"
+
+# Specifies how environment variables are:
+# - converted from a string to a value on Nushell startup (from_string)
+# - converted from a value back to a string when running external commands (to_string)
+# Note: The conversions happen *after* config.nu is loaded
+$env.ENV_CONVERSIONS = {
+    "PATH": {
+        from_string: { |s| $s | split row (char esep) | path expand --no-symlink }
+        to_string: { |v| $v | path expand --no-symlink | str join (char esep) }
+    }
+    "Path": {
+        from_string: { |s| $s | split row (char esep) | path expand --no-symlink }
+        to_string: { |v| $v | path expand --no-symlink | str join (char esep) }
+    }
+}
+
+# Directories to search for scripts when calling source or use
+# The default for this is $nu.default-config-dir/scripts
+$env.NU_LIB_DIRS = [
+    ($nu.default-config-dir | path join 'scripts') # add <nushell-config-dir>/scripts
+    ($nu.data-dir | path join 'completions') # default home for nushell completions
+]
+
+# Directories to search for plugin binaries when calling register
+# The default for this is $nu.default-config-dir/plugins
+$env.NU_PLUGIN_DIRS = [
+    ($nu.default-config-dir | path join 'plugins') # add <nushell-config-dir>/plugins
+]