fix: correct patch application and build options

These were missed out in the merge

zathura-pdf-mupdf.spec

@@ -6,7 +6,7 @@
 Name:             zathura-pdf-mupdf
 
 Version:          0.3.8
-Release:          2%{?dist}
+Release:          3%{?dist}
 Summary:          PDF support for zathura via mupdf
 License:          zlib
 URL:              https://pwmt.org/projects/%{name}/
@@ -18,6 +18,7 @@ BuildRequires:    cairo-devel
 # Needed to validate the desktop file
 BuildRequires:    desktop-file-utils
 BuildRequires:    gcc
+BuildRequires:    git-core
 BuildRequires:    girara-devel
 BuildRequires:    glib2-devel
 # Needed to validate appdata
@@ -44,10 +45,10 @@ Conflicts:        zathura-pdf-poppler < 0.2.9
 This plugin adds PDF support to zathura using the mupdf rendering engine.
 
 %prep
-%autosetup
+%autosetup -S git -p1
 
 %build
-%meson
+%meson -Dlink-external=true
 %meson_build
 
 %install