man peek gzipped twice on NixOS

[xzfc]

man peek on NixOS is binary garbage. It seems that some part of the build system doesn't know that peek.1 is already compressed and gzips it for the second time.

One possible fix is to add .gz suffix to generated manpage filename. This is consistent with behavior of data/man/CMakeLists.txt which appends .gz suffix.

diff --git a/data/man/meson.build b/data/man/meson.build
index 71da75c..54e7b73 100644
--- a/data/man/meson.build
+++ b/data/man/meson.build
@@ -17,7 +17,7 @@ else
       join_paths(meson.current_source_dir(), 'peek.1.txt'),
       '@OUTPUT@'
     ],
-    output: 'peek.1',
+    output: 'peek.1.gz',
     install: true,
     install_dir: join_paths(get_option('mandir'), 'man1'))
 endif