Use xelatex instead of pdflatex.

_shake/Build.hs

@@ -11,7 +11,7 @@ fullTarget :: FilePath
 fullTarget = buildDir </> target <.> "pdf"
 
 pdflatexCmd :: [String]
-pdflatexCmd = ["pdflatex", "-halt-on-error", "-output-directory=" ++ buildDir, target]
+pdflatexCmd = ["xelatex", "-halt-on-error", "-output-directory=" ++ buildDir, target]
 
 -- | Filters out the files which contain '#'.
 noEmacsFiles :: [FilePath] -> [FilePath]

candidature.sty

@@ -2,5 +2,6 @@
 \ProvidesPackage{candidature}[2015/05/14 Le style des dossiers de scolobb]
 \typeout{Le style des dossiers do scolobb}
 
+\usepackage{fontspec}
 \usepackage[french]{babel}
 \usepackage[backend=biber]{biblatex}