New comment by sgn on void-packages repository

https://github.com/void-linux/void-packages/pull/39360#issuecomment-1251001665

Comment:
> I think it's better to patch their Makefile to have let's say -include config.mk and put the option there. Whoever want some custom option could put the config into files directory. With that approach, we won't need to care for nnn's change in build option whatsoever. As for build dependencies, just add them all. nnn is always a leaf (as in graph) packages.

Here is possible implementation, no build options required:
```diff
 srcpkgs/nnn/patches/config.patch | 11 +++++++++++
 srcpkgs/nnn/template             |  5 ++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/srcpkgs/nnn/patches/config.patch b/srcpkgs/nnn/patches/config.patch
new file mode 100644
index 0000000000..e7d7238276
--- /dev/null
+++ b/srcpkgs/nnn/patches/config.patch
@@ -0,0 +1,11 @@
+--- a/Makefile
++++ b/Makefile
+@@ -36,6 +36,8 @@ O_GITSTATUS := 0 # add git status to det
+ O_NAMEFIRST := 0 # print file name first, add uid and guid to detail view
+ O_RESTOREPREVIEW := 0 # add preview pipe to close and restore preview pane
+ 
++-include config.mk
++
+ # convert targets to flags for backwards compatibility
+ ifneq ($(filter debug,$(MAKECMDGOALS)),)
+ 	O_DEBUG := 1
diff --git a/srcpkgs/nnn/template b/srcpkgs/nnn/template
index cea82d3681..32f5fec3c1 100644
--- a/srcpkgs/nnn/template
+++ b/srcpkgs/nnn/template
@@ -5,7 +5,7 @@ revision=1
 build_style=gnu-makefile
 make_install_target="install install-desktop"
 hostmakedepends="pkg-config"
-makedepends="ncurses-devel readline-devel"
+makedepends="ncurses-devel readline-devel gpm-devel pcre-devel"
 short_desc="Missing terminal file browser for X"
 maintainer="Dennis Kraus <kraus@posteo.de>"
 license="BSD-2-Clause"
@@ -22,6 +22,9 @@ pre_build() {
 	if [ "$XBPS_TARGET_LIBC" = "musl" ]; then
 		export LDLIBS=-lfts
 	fi
+	if [ -f "$FILESDIR/config.mk" ]; then
+		cp "$FILESDIR/config.mk" .
+	fi
 }
 
 post_install() {
```

Then:
```sh
mkdir -p srcpkgs/nnn/files
cat <<-EOF >srcpkgs/nnn/files/config.mk
O_ICONS := 1
EOF
```