Upstream style file relies on font files being present on the system
globally.  This is not quite how Nix usually does thing, so this patch
changes the style file to instead look fonts up in hardcoded
locations, which are later patched up to refer to the package outputs,
thus ensuring the style always uses the fonts packaged with it.

diff --git a/TeX/junicode.sty b/TeX/junicode.sty
index 83bd45d..8fe671c 100644
--- a/TeX/junicode.sty
+++ b/TeX/junicode.sty
@@ -208,7 +208,14 @@
 
 \RequirePackage{fontspec}
 \defaultfontfeatures{Ligatures=TeX, Extension=.\junicode@fonttype}
-\defaultfontfeatures{Ligatures=TeX}
+
+\def\junicode@fonttype@otf{otf}
+
+\ifx\junicode@fonttype\junicode@fonttype@otf
+  \def\junicode@fontpath{@@@opentype_path@@@}
+\else
+  \def\junicode@fontpath{@@@truetype_path@@@}
+\fi
 
 \ifxetex
 \typeout{\junicode@regstylename}
@@ -219,6 +226,7 @@
    ItalicFont =        *-\junicode@italstylename,
    BoldFont =          *-\junicode@boldstylename,
    BoldItalicFont =    *-\junicode@boldstylename Italic,
+   Path =              \junicode@fontpath,
   ]{Junicode}
 \fi
 \ifluatex
@@ -230,6 +238,7 @@
    ItalicFont =        *-\junicode@italstylename,
    BoldFont =          *-\junicode@boldstylename,
    BoldItalicFont =    *-\junicode@boldstylename Italic,
+   Path =              \junicode@fontpath,
   ]{Junicode}
 \fi
 
@@ -242,6 +251,7 @@
         #3
         Numbers =           {\junicode@figurealign,\junicode@figurestyle},
         SmallCapsFeatures = {Letters=SmallCaps},
+        Path =              \junicode@fontpath,
     ]
 }
 \fi
@@ -252,6 +262,7 @@
         #3
         Numbers =           {\junicode@figurealign,\junicode@figurestyle},
         SmallCapsFeatures = {Letters=SmallCaps},
+        Path =              \junicode@fontpath,
     ]
 }
 \fi
diff --git a/TeX/junicodevf.lua b/TeX/junicodevf.lua
index 7148668..acebe82 100644
--- a/TeX/junicodevf.lua
+++ b/TeX/junicodevf.lua
@@ -148,7 +148,7 @@ function mkfontcommands()
          romfontcmd = "jRegular"
          italfontcmd = "jItalic"
       end
-      tex.print("\\junicodevf@newfont{\\" .. romfontcmd .. "}{JunicodeVF}{\\" .. defcmd .. "}{\\" .. defsizecmd .. "}")
+      tex.print("\\junicodevf@newfont{\\" .. romfontcmd .. "}{JunicodeVF-Roman}{\\" .. defcmd .. "}{\\" .. defsizecmd .. "}")
       tex.print("\\junicodevf@newfont{\\" .. italfontcmd .. "}{JunicodeVF-Italic}{\\" .. defcmd .. "}{\\" .. defsizecmd .. "}")
    end
 end
diff --git a/TeX/junicodevf.sty b/TeX/junicodevf.sty
index c01ccaf..07a99ad 100644
--- a/TeX/junicodevf.sty
+++ b/TeX/junicodevf.sty
@@ -168,11 +168,13 @@ mkwidthcommands(wdindex, adjustment)}}
 
 % DECLARE THE FONTS
 
-\setmainfont{Junicode VF}[
-    ItalicFont =         {*-Italic},
-    BoldFont =           {*},
-    BoldItalicFont =     {*-Italic},
+\setmainfont{JunicodeVF-Roman}[
+    ItalicFont =         {JunicodeVF-Italic},
+    BoldFont =           {JunicodeVF-Roman},
+    BoldItalicFont =     {JunicodeVF-Italic},
     Renderer =           HarfBuzz,
+    Extension =          .ttf,
+    Path =               @@@truetype_path@@@,
     Numbers =            {\junicodevf@figurealign,\junicodevf@figurestyle},
     \MainDef,
     UprightFeatures =    {\MainRegDef
@@ -188,6 +190,8 @@ mkwidthcommands(wdindex, adjustment)}}
 \newcommand*{\junicodevf@newfont}[4]{
     \setfontface#1{#2}[
         Renderer =          HarfBuzz,
+        Extension =          .ttf,
+        Path =               @@@truetype_path@@@,
         Numbers =           {\junicodevf@figurealign,\junicodevf@figurestyle},
         SmallCapsFont =     {*},
         SmallCapsFeatures = {Letters=SmallCaps},
@@ -200,43 +204,59 @@ mkwidthcommands(wdindex, adjustment)}}
 
 % ENLARGED FACES
 
-\setfontface\EnlargedOne{JunicodeVF}[
+\setfontface\EnlargedOne{JunicodeVF-Roman}[
     Renderer = HarfBuzz,
+    Extension = .ttf,
+    Path = @@@truetype_path@@@,
     \ENLAOneSizeDef
 ]
 
 \setfontface\EnlargedOneItalic{JunicodeVF-Italic}[
     Renderer = HarfBuzz,
+    Extension = .ttf,
+    Path = @@@truetype_path@@@,
     \ENLAOneSizeDef
 ]
 
-\setfontface\EnlargedTwo{JunicodeVF}[
+\setfontface\EnlargedTwo{JunicodeVF-Roman}[
     Renderer = HarfBuzz,
+    Extension = .ttf,
+    Path = @@@truetype_path@@@,
     \ENLATwoSizeDef
 ]
 
 \setfontface\EnlargedTwoItalic{JunicodeVF-Italic}[
     Renderer = HarfBuzz,
+    Extension = .ttf,
+    Path = @@@truetype_path@@@,
     \ENLATwoSizeDef
 ]
 
-\setfontface\EnlargedThree{JunicodeVF}[
+\setfontface\EnlargedThree{JunicodeVF-Roman}[
     Renderer = HarfBuzz,
+    Extension = .ttf,
+    Path = @@@truetype_path@@@,
     \ENLAThreeSizeDef
 ]
 
 \setfontface\EnlargedThreeItalic{JunicodeVF-Italic}[
     Renderer = HarfBuzz,
+    Extension = .ttf,
+    Path = @@@truetype_path@@@,
     \ENLAThreeSizeDef
 ]
 
-\setfontface\EnlargedFour{JunicodeVF}[
+\setfontface\EnlargedFour{JunicodeVF-Roman}[
     Renderer = HarfBuzz,
+    Extension = .ttf,
+    Path = @@@truetype_path@@@,
     \ENLAFourSizeDef
 ]
 
 \setfontface\EnlargedFourItalic{JunicodeVF-Italic}[
     Renderer = HarfBuzz,
+    Extension = .ttf,
+    Path = @@@truetype_path@@@,
     \ENLAFourSizeDef
 ]