diff --git a/pkgs/development/compilers/rust/1_38_0.nix b/pkgs/development/compilers/rust/1_38.nix
similarity index 95%
rename from pkgs/development/compilers/rust/1_38_0.nix
rename to pkgs/development/compilers/rust/1_38.nix
index 13d2139bffdc..1521c9618590 100644
--- a/pkgs/development/compilers/rust/1_38_0.nix
+++ b/pkgs/development/compilers/rust/1_38.nix
@@ -18,5 +18,5 @@ import ./default.nix {
     x86_64-apple-darwin = "b2310c97ffb964f253c4088c8d29865f876a49da2a45305493af5b5c7a3ca73d";
   };
 
-  selectRustPackage = pkgs: pkgs.rust_1_38_0;
+  selectRustPackage = pkgs: pkgs.rust_1_38;
 }
diff --git a/pkgs/development/compilers/rust/1_42_0.nix b/pkgs/development/compilers/rust/1_42.nix
similarity index 97%
rename from pkgs/development/compilers/rust/1_42_0.nix
rename to pkgs/development/compilers/rust/1_42.nix
index e18d89af6a13..8717aaf76a23 100644
--- a/pkgs/development/compilers/rust/1_42_0.nix
+++ b/pkgs/development/compilers/rust/1_42.nix
@@ -34,7 +34,7 @@ import ./default.nix {
     x86_64-apple-darwin = "b6504003ab70b11f278e0243a43ba9d6bf75e8ad6819b4058a2b6e3991cc8d7a";
   };
 
-  selectRustPackage = pkgs: pkgs.rust_1_42_0;
+  selectRustPackage = pkgs: pkgs.rust_1_42;
 
   rustcPatches = [
     ./0001-Allow-getting-no_std-from-the-config-file.patch
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 3a504f20d944..19bf75f20a0d 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -385,6 +385,8 @@ mapAliases ({
   ruby_2_5_0 = throw "deprecated 2018-0213: use a newer version of ruby";
   rubyPackages_2_4 = throw "deprecated 2019-12: use a newer version of rubyPackages instead";
   rubygems = throw "deprecated 2016-03-02: rubygems is now bundled with ruby";
+  rust_1_38_0 = rust_1_38; # added 2020-03-13
+  rust_1_42_0 = rust_1_42; # added 2020-03-13
   rxvt_unicode-with-plugins = rxvt-unicode; # added 2020-02-02
   rxvt_unicode = rxvt-unicode-unwrapped; # added 2020-02-02
   urxvt_autocomplete_all_the_things = rxvt-unicode-plugins.autocomplete-all-the-things; # added 2020-02-02
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index a88870b66559..471016e6765d 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -8832,17 +8832,17 @@ in
     inherit (darwin) apple_sdk;
   };
 
-  rust_1_42_0 = callPackage ../development/compilers/rust/1_42_0.nix {
+  rust_1_42 = callPackage ../development/compilers/rust/1_42.nix {
     inherit (darwin.apple_sdk.frameworks) CoreFoundation Security;
   };
-  rust_1_38_0 = callPackage ../development/compilers/rust/1_38_0.nix {
+  rust_1_38 = callPackage ../development/compilers/rust/1_38.nix {
     inherit (darwin.apple_sdk.frameworks) CoreFoundation Security;
   };
-  rust = rust_1_42_0;
+  rust = rust_1_42;
 
-  rustPackages_1_42_0 = rust_1_42_0.packages.stable;
-  rustPackages_1_38_0 = rust_1_38_0.packages.stable;
-  rustPackages = rustPackages_1_42_0;
+  rustPackages_1_42 = rust_1_42.packages.stable;
+  rustPackages_1_38 = rust_1_38.packages.stable;
+  rustPackages = rustPackages_1_42;
 
   inherit (rustPackages) cargo clippy rustc rustPlatform;
   inherit (rust) makeRustPlatform;
@@ -8925,7 +8925,7 @@ in
     inherit (darwin.apple_sdk.frameworks) Security;
   };
   rustracerd = callPackage ../development/tools/rust/racerd {
-    inherit (rustPackages_1_38_0) rustPlatform;
+    inherit (rustPackages_1_38) rustPlatform;
     inherit (darwin.apple_sdk.frameworks) Security;
   };
   rust-bindgen = callPackage ../development/tools/rust/bindgen { };
@@ -21910,7 +21910,7 @@ in
 
   thunderbird = callPackage ../applications/networking/mailreaders/thunderbird {
     inherit (gnome2) libIDL;
-    inherit (rustPackages_1_38_0) cargo rustc;
+    inherit (rustPackages_1_38) cargo rustc;
     libpng = libpng_apng;
     gtk3Support = true;
   };