diff --git a/pkgs/development/tools/rust/rust-analyzer/default.nix b/pkgs/development/tools/rust/rust-analyzer/default.nix
index d8b31810c54..cb10b8196aa 100644
--- a/pkgs/development/tools/rust/rust-analyzer/default.nix
+++ b/pkgs/development/tools/rust/rust-analyzer/default.nix
@@ -1,16 +1,58 @@
-{ pkgs, callPackage, CoreServices }:
+{ lib, stdenv, fetchFromGitHub, rustPlatform, CoreServices, cmake
+, libiconv
+, useMimalloc ? false
+, doCheck ? true
+}:
 
-{
-  rust-analyzer-unwrapped = callPackage ./generic.nix rec {
-    rev = "2021-03-22";
-    version = "unstable-${rev}";
-    sha256 = "sha256-Q8yr5x4+R9UCk5kw/nJgBtGVBeZTDwyuwpyNJUKSPzA=";
-    cargoSha256 = "sha256-cJ5KPNrX1H4IfHENDGyU2rgxl5TTqvoeXk7558oqwuA=";
+let
+  rev = "2021-04-05";
+in
 
-    inherit CoreServices;
+rustPlatform.buildRustPackage {
+  pname = "rust-analyzer-unwrapped";
+  version = "unstable-${rev}";
+  cargoSha256 = "sha256-kDwdKa08E0h24lOOa7ALeNqHlMjMry/ru1qwCIyKmuE=";
+
+  src = fetchFromGitHub {
+    owner = "rust-analyzer";
+    repo = "rust-analyzer";
+    inherit rev;
+    sha256 = "sha256-ZDxy87F3uz8bTF1/2LIy5r4Nv/M3xe97F7mwJNEFcUs=";
   };
 
-  rust-analyzer = callPackage ./wrapper.nix {} {
-    unwrapped = pkgs.rust-analyzer-unwrapped;
+  buildAndTestSubdir = "crates/rust-analyzer";
+
+  cargoBuildFlags = lib.optional useMimalloc "--features=mimalloc";
+
+  nativeBuildInputs = lib.optional useMimalloc cmake;
+
+  buildInputs = lib.optionals stdenv.isDarwin [
+    CoreServices
+    libiconv
+  ];
+
+  RUST_ANALYZER_REV = rev;
+
+  inherit doCheck;
+  preCheck = lib.optionalString doCheck ''
+    export RUST_SRC_PATH=${rustPlatform.rustLibSrc}
+  '';
+
+  doInstallCheck = true;
+  installCheckPhase = ''
+    runHook preInstallCheck
+    versionOutput="$($out/bin/rust-analyzer --version)"
+    echo "'rust-analyzer --version' returns: $versionOutput"
+    [[ "$versionOutput" == "rust-analyzer ${rev}" ]]
+    runHook postInstallCheck
+  '';
+
+  passthru.updateScript = ./update.sh;
+
+  meta = with lib; {
+    description = "An experimental modular compiler frontend for the Rust language";
+    homepage = "https://github.com/rust-analyzer/rust-analyzer";
+    license = with licenses; [ mit asl20 ];
+    maintainers = with maintainers; [ oxalica ];
   };
 }
diff --git a/pkgs/development/tools/rust/rust-analyzer/generic.nix b/pkgs/development/tools/rust/rust-analyzer/generic.nix
deleted file mode 100644
index ddb834af6c3..00000000000
--- a/pkgs/development/tools/rust/rust-analyzer/generic.nix
+++ /dev/null
@@ -1,57 +0,0 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, CoreServices, cmake
-, libiconv
-, useMimalloc ? false
-, doCheck ? true
-
-# Version specific args
-, rev, version, sha256, cargoSha256
-}:
-
-rustPlatform.buildRustPackage {
-  pname = "rust-analyzer-unwrapped";
-  inherit version cargoSha256;
-
-  src = fetchFromGitHub {
-    owner = "rust-analyzer";
-    repo = "rust-analyzer";
-    inherit rev sha256;
-  };
-
-  buildAndTestSubdir = "crates/rust-analyzer";
-
-  cargoBuildFlags = lib.optional useMimalloc "--features=mimalloc";
-
-  nativeBuildInputs = lib.optional useMimalloc cmake;
-
-  buildInputs = lib.optionals stdenv.isDarwin [
-    CoreServices
-    libiconv
-  ];
-
-  RUST_ANALYZER_REV = rev;
-
-  inherit doCheck;
-  preCheck = lib.optionalString doCheck ''
-    export RUST_SRC_PATH=${rustPlatform.rustLibSrc}
-  '';
-
-  doInstallCheck = true;
-  installCheckPhase = ''
-    runHook preInstallCheck
-    versionOutput="$($out/bin/rust-analyzer --version)"
-    echo "'rust-analyzer --version' returns: $versionOutput"
-    [[ "$versionOutput" == "rust-analyzer ${rev}" ]]
-    runHook postInstallCheck
-  '';
-
-  passthru.updateScript = ./update.sh;
-
-  patches = [ ./rust_1_49.patch ];
-
-  meta = with lib; {
-    description = "An experimental modular compiler frontend for the Rust language";
-    homepage = "https://github.com/rust-analyzer/rust-analyzer";
-    license = with licenses; [ mit asl20 ];
-    maintainers = with maintainers; [ oxalica ];
-  };
-}
diff --git a/pkgs/development/tools/rust/rust-analyzer/rust_1_49.patch b/pkgs/development/tools/rust/rust-analyzer/rust_1_49.patch
deleted file mode 100644
index fcde6d6337e..00000000000
--- a/pkgs/development/tools/rust/rust-analyzer/rust_1_49.patch
+++ /dev/null
@@ -1,13 +0,0 @@
-diff --git a/crates/ide_assists/src/handlers/convert_iter_for_each_to_for.rs b/crates/ide_assists/src/handlers/convert_iter_for_each_to_for.rs
-index 4e75a7b14..91f51a1a7 100644
---- a/crates/ide_assists/src/handlers/convert_iter_for_each_to_for.rs
-+++ b/crates/ide_assists/src/handlers/convert_iter_for_each_to_for.rs
-@@ -93,7 +93,7 @@ fn validate_method_call_expr(
-     let krate = module.krate();
- 
-     let iter_trait = FamousDefs(sema, Some(krate)).core_iter_Iterator()?;
--    it_type.impls_trait(sema.db, iter_trait, &[]).then(|| (expr, receiver))
-+    if it_type.impls_trait(sema.db, iter_trait, &[]) { Some((expr, receiver)) } else { None }
- }
- 
- #[cfg(test)]
diff --git a/pkgs/development/tools/rust/rust-analyzer/update.sh b/pkgs/development/tools/rust/rust-analyzer/update.sh
index 1bd46862692..185ce70534c 100755
--- a/pkgs/development/tools/rust/rust-analyzer/update.sh
+++ b/pkgs/development/tools/rust/rust-analyzer/update.sh
@@ -25,7 +25,7 @@ echo "$old_rev -> $rev"
 sha256=$(nix-prefetch -f "$nixpkgs" rust-analyzer-unwrapped.src --rev "$rev")
 # Clear cargoSha256 to avoid inconsistency.
 sed -e "s#rev = \".*\"#rev = \"$rev\"#" \
-    -e "s#sha256 = \".*\"#sha256 = \"$sha256\"#" \
+    -e "/fetchFromGitHub/,/}/ s#sha256 = \".*\"#sha256 = \"$sha256\"#" \
     -e "s#cargoSha256 = \".*\"#cargoSha256 = \"sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=\"#" \
     --in-place ./default.nix
 node_src="$(nix-build "$nixpkgs" -A rust-analyzer.src --no-out-link)/editors/code"
diff --git a/pkgs/development/tools/rust/rust-analyzer/wrapper.nix b/pkgs/development/tools/rust/rust-analyzer/wrapper.nix
index bed20628182..6fa5207de6e 100644
--- a/pkgs/development/tools/rust/rust-analyzer/wrapper.nix
+++ b/pkgs/development/tools/rust/rust-analyzer/wrapper.nix
@@ -1,17 +1,15 @@
-{ lib, rustPlatform, runCommandNoCC, makeWrapper }:
-
-lib.makeOverridable ({
-  unwrapped,
-  pname ? "rust-analyzer",
-  version ? unwrapped.version,
+{ lib, rustPlatform, runCommand, makeWrapper, rust-analyzer-unwrapped
+, pname ? "rust-analyzer"
+, version ? rust-analyzer-unwrapped.version
   # Use name from `RUST_SRC_PATH`
-  rustSrc ? rustPlatform.rustLibSrc,
-}: runCommandNoCC "${pname}-${version}" {
+, rustSrc ? rustPlatform.rustLibSrc
+}:
+runCommand "${pname}-${version}" {
   inherit pname version;
-  inherit (unwrapped) src meta;
+  inherit (rust-analyzer-unwrapped) src meta;
   nativeBuildInputs = [ makeWrapper ];
 } ''
   mkdir -p $out/bin
-  makeWrapper ${unwrapped}/bin/rust-analyzer $out/bin/rust-analyzer \
+  makeWrapper ${rust-analyzer-unwrapped}/bin/rust-analyzer $out/bin/rust-analyzer \
     --set-default RUST_SRC_PATH "${rustSrc}"
-'')
+''
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 016372fbc48..6b14765c3f5 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -11323,10 +11323,10 @@ in
   rustracerd = callPackage ../development/tools/rust/racerd {
     inherit (darwin.apple_sdk.frameworks) Security;
   };
-  inherit (callPackage ../development/tools/rust/rust-analyzer {
+  rust-analyzer-unwrapped = callPackage ../development/tools/rust/rust-analyzer {
     inherit (darwin.apple_sdk.frameworks) CoreServices;
-  })
-    rust-analyzer-unwrapped rust-analyzer;
+  };
+  rust-analyzer = callPackage ../development/tools/rust/rust-analyzer/wrapper.nix { };
   rust-bindgen = callPackage ../development/tools/rust/bindgen { };
   rust-cbindgen = callPackage ../development/tools/rust/cbindgen {
     inherit (darwin.apple_sdk.frameworks) Security;