diff --git a/pkgs/tools/archivers/unrar/default.nix b/pkgs/tools/archivers/unrar/default.nix
index 6e545726b14a..6ed741512974 100644
--- a/pkgs/tools/archivers/unrar/default.nix
+++ b/pkgs/tools/archivers/unrar/default.nix
@@ -7,9 +7,13 @@ stdenv.mkDerivation {
     sha256 = "0inzy0jlwqm18i6lq17aq4n2baqqlbjyr6incw4s9cxrvmjq51ls";
   };
 
-  makeFlags = "-f makefile.unix";
+  buildPhase = "make -f makefile.unix unrar lib CXXFLAGS=\"-fPIC -O2\"";
 
-  installPhase = "mkdir -p \${out}/bin/ ; cp unrar \${out}/bin/;";
+  installPhase = ''
+    mkdir -p $out/bin $out/lib
+    cp unrar $out/bin
+    cp libunrar.so $out/lib
+  '';
 
   buildInputs = [];
 }