build: don't use sh for scdoc

meson.build

@@ -2,7 +2,7 @@ project(
     'waybar', 'cpp', 'c',
     version: '0.9.24',
     license: 'MIT',
-    meson_version: '>= 0.56.0',
+    meson_version: '>= 0.59.0',
     default_options : [
         'cpp_std=c++20',
         'buildtype=release',
@@ -435,9 +435,6 @@ install_data(
 scdoc = dependency('scdoc', version: '>=1.9.2', native: true, required: get_option('man-pages'))
 
 if scdoc.found()
-    scdoc_prog = find_program(scdoc.get_variable(pkgconfig: 'scdoc'), native: true)
-    sh = find_program('sh', native: true)
-
     main_manpage = configure_file(
         input: 'man/waybar.5.scd.in',
         output: 'waybar.5.scd',
@@ -510,9 +507,9 @@ if scdoc.found()
             # drops the 'man' if `path` is an absolute path
             input: 'man' / path,
             output: output,
-            command: [
-                sh, '-c', '@0@ < @INPUT@ > @1@'.format(scdoc_prog.full_path(), output)
-            ],
+            command: scdoc.get_variable('scdoc'),
+            feed: true,
+            capture: true,
             install: true,
             install_dir: '@0@/man@1@'.format(mandir, section)
         )