diff --git a/pkgs/development/compilers/adobe-flex-sdk/default.nix b/pkgs/development/compilers/adobe-flex-sdk/default.nix
index d4a540430774..9cc012d917f1 100644
--- a/pkgs/development/compilers/adobe-flex-sdk/default.nix
+++ b/pkgs/development/compilers/adobe-flex-sdk/default.nix
@@ -1,6 +1,6 @@
 args: with args;
 stdenv.mkDerivation rec {
-  name = "adobe_flex_sdk_4.0.0.14159_mpl";
+  name = "adobe-flex-sdk-4.0.0.14159-mpl";
 
   src = fetchurl {
     # This is the open source distribution
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 7c78442f83a0..8dc420ffaffb 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2019,7 +2019,7 @@ let
     inherit gmp mpfr;
   };
 
-  adobeFlexSDK = import ../development/compilers/adobe-flex-sdk {
+  adobe_flex_sdk = import ../development/compilers/adobe-flex-sdk {
     inherit fetchurl stdenv unzip jre;
   };