diff --git a/app/EpubParser.hs b/app/EpubParser.hs
index 83dd59b..a83bfb9 100644
--- a/app/EpubParser.hs
+++ b/app/EpubParser.hs
@@ -6,3 +6,9 @@ import qualified Data.ByteString.Lazy.Char8 as C8
 
 openEpub :: FilePath -> IO (Either String Archive)
 openEpub path = toArchive <$> BL.readFile path >>= \archive -> maybe (pure $ Left "Error reading file") (\entry -> if fromEntry entry == C8.pack "application/epub+zip" then pure (Right archive) else pure (Left "Wrong mimetype")) (findEntryByPath "mimetype" archive)
+
+getOpfPath :: Archive -> Maybe FilePath
+getOpfPath archive = do
+  entry <- findEntryByPath "META-INF/container.xml" archive
+
+  return "OEBPS/content.opf"
diff --git a/svitak.cabal b/svitak.cabal
index ee91af7..3aa8b40 100644
--- a/svitak.cabal
+++ b/svitak.cabal
@@ -54,24 +54,16 @@ common warnings
     ghc-options: -Wall
 
 executable svitak
-    -- Import common warning flags.
     import:           warnings
-
-    -- .hs or .lhs file containing the Main module.
     main-is:          Main.hs
 
-    -- Modules included in this executable, other than Main.
-    -- other-modules:
+    other-modules:    EpubParser
 
-    -- LANGUAGE extensions used by modules in this package.
-    -- other-extensions:
-
-    -- Other library packages from which modules are imported.
     build-depends:    base ^>=4.21.0.0,
-                      epub-metadata >=5.4
+                      bytestring >= 0.12.2.0,
+                      epub-metadata >=5.4,
+                      zip-archive >= 0.4.3.2,
+                      tagsoup
 
-    -- Directories containing source files.
     hs-source-dirs:   app
-
-    -- Base language which the package is written in.
     default-language: Haskell2010