diff --git a/pkgs/development/libraries/haskell/case-insensitive/1.2.0.0.nix b/pkgs/development/libraries/haskell/case-insensitive/1.2.0.0.nix
new file mode 100644
index 000000000000..aa8996b0fc3f
--- /dev/null
+++ b/pkgs/development/libraries/haskell/case-insensitive/1.2.0.0.nix
@@ -0,0 +1,17 @@
+{ cabal, deepseq, hashable, HUnit, testFramework
+, testFrameworkHunit, text
+}:
+
+cabal.mkDerivation (self: {
+  pname = "case-insensitive";
+  version = "1.2.0.0";
+  sha256 = "0ybdmqaqh9hdl3dl5kx8qhs4b67g78fhnkqnd3y2lpgqjvhnbzp4";
+  buildDepends = [ deepseq hashable text ];
+  testDepends = [ HUnit testFramework testFrameworkHunit text ];
+  meta = {
+    homepage = "https://github.com/basvandijk/case-insensitive";
+    description = "Case insensitive string comparison";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+  };
+})
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 27f375b97ac2..d3192e4e9f7d 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -143,7 +143,7 @@ let result = let callPackage = x : y : modifyPrio (newScope result.finalReturn x
     inherit (self) cabal ghc;
     async        = self.async_2_0_1_5;
     attoparsec   = self.attoparsec_0_11_2_1;
-    caseInsensitive = self.caseInsensitive_1_1_0_3;
+    caseInsensitive = self.caseInsensitive_1_2_0_0;
     cgi          = self.cgi_3001_1_8_5;
     fgl          = self.fgl_5_4_2_4;
     GLUT         = self.GLUT_2_5_1_0;
@@ -729,7 +729,8 @@ let result = let callPackage = x : y : modifyPrio (newScope result.finalReturn x
 
   caseInsensitive_1_0_0_1 = callPackage ../development/libraries/haskell/case-insensitive/1.0.0.1.nix {};
   caseInsensitive_1_1_0_3 = callPackage ../development/libraries/haskell/case-insensitive/1.1.0.3.nix {};
-  caseInsensitive = self.caseInsensitive_1_1_0_3;
+  caseInsensitive_1_2_0_0 = callPackage ../development/libraries/haskell/case-insensitive/1.2.0.0.nix {};
+  caseInsensitive = self.caseInsensitive_1_2_0_0;
 
   cautiousFile = callPackage ../development/libraries/haskell/cautious-file {};