diff --git a/latex-svg-hakyll.cabal b/latex-svg-hakyll.cabal
--- a/latex-svg-hakyll.cabal
+++ b/latex-svg-hakyll.cabal
@@ -1,6 +1,6 @@
 cabal-version: 2.2
 name:          latex-svg-hakyll
-version:       0.1
+version:       0.2
 synopsis:      Use actual LaTeX to render formulae inside Hakyll pages
 description:
   This library provides functions to render all math formulae inside
@@ -31,7 +31,7 @@
   build-depends:
     , base              >=4.10      && <4.14
     , hakyll            ^>=4.12.5.2 || ^>=4.13.0.0
-    , latex-svg-image   ^>=0.1
-    , latex-svg-pandoc  ^>=0.1
+    , latex-svg-image   ^>=0.2
+    , latex-svg-pandoc  ^>=0.2
     , lrucache          ^>=1.2
     , pandoc-types      ^>=1.17.6.1 || ^>=1.20
diff --git a/src/Hakyll/Contrib/LaTeX.hs b/src/Hakyll/Contrib/LaTeX.hs
--- a/src/Hakyll/Contrib/LaTeX.hs
+++ b/src/Hakyll/Contrib/LaTeX.hs
@@ -13,6 +13,7 @@
     ) where
 
 import Data.Char              (isSpace)
+import Data.Maybe             (fromMaybe)
 import Hakyll.Core.Compiler   (Compiler, unsafeCompiler)
 import Text.Pandoc.Definition (Pandoc)
 
@@ -45,9 +46,9 @@
 initFormulaCompilerSVG cs eo = do
     mImageForFormula <- curry <$> memoizeLru (Just cs) (uncurry drawFormula)
     let eachFormula x y = do
-          putStrLn $ "    formula (" ++ environment x ++ ") \"" ++ equationPreview y ++ "\""
+          putStrLn $ "    formula (" ++ environment' x ++ ") \"" ++ equationPreview y ++ "\""
           mImageForFormula x y
-    return $ \fo -> unsafeCompiler . convertAllFormulaeSVGWith eachFormula fo
+    return $ \fo -> unsafeCompiler . convertFormulaSvgPandocWith eachFormula fo
   where
     drawFormula x y = do
         putStrLn "      drawing..."
@@ -72,10 +73,10 @@
 initFormulaCompilerSVGPure eo fo pandoc = do
     let mImageForFormula = drawFormula
     let eachFormula x y = do
-          putStrLn $ "    formula (" ++ environment x ++ ") \"" ++ equationPreview y ++ "\""
+          putStrLn $ "    formula (" ++ environment' x ++ ") \"" ++ equationPreview y ++ "\""
           mImageForFormula x y
 
-    unsafeCompiler (convertAllFormulaeSVGWith eachFormula fo pandoc)
+    unsafeCompiler (convertFormulaSvgPandocWith eachFormula fo pandoc)
   where
     drawFormula x y = do
         putStrLn "      drawing..."
@@ -91,10 +92,10 @@
     -> Pandoc -> Compiler Pandoc
 compileFormulaeSVG eo po =
     let eachFormula x y = do
-          putStrLn $ "    formula (" ++ environment x ++ ") \"" ++ equationPreview y ++ "\""
+          putStrLn $ "    formula (" ++ environment' x ++ ") \"" ++ equationPreview y ++ "\""
           putStrLn   "      drawing..."
           imageForFormula eo x y
-    in unsafeCompiler . convertAllFormulaeSVGWith eachFormula po
+    in unsafeCompiler . convertFormulaSvgPandocWith eachFormula po
 
 equationPreview :: String -> String
 equationPreview x'
@@ -114,3 +115,6 @@
                 ret <- action arg
                 LRU.insert arg ret lru
                 return ret
+
+environment' :: FormulaOptions -> String
+environment'  = fromMaybe "-" . environment