diff --git a/pkgs/development/compilers/crystal/build-package.nix b/pkgs/development/compilers/crystal/build-package.nix
index ce8f0c32537..215c3d37d88 100644
--- a/pkgs/development/compilers/crystal/build-package.nix
+++ b/pkgs/development/compilers/crystal/build-package.nix
@@ -72,16 +72,17 @@ stdenv.mkDerivation (mkDerivationArgs // {
 
   PREFIX = placeholder "out";
 
-  buildInputs = args.buildInputs or [ ] ++ [ crystal ]
-    ++ lib.optional (format != "crystal") shards;
+  strictDeps = true;
+  buildInputs = args.buildInputs or [ ] ++ [ crystal ];
 
   nativeBuildInputs = args.nativeBuildInputs or [ ] ++ [
+    crystal
     git
     installShellFiles
     removeReferencesTo
     pkg-config
     which
-  ];
+  ] ++ lib.optional (format != "crystal") shards;
 
   buildPhase = args.buildPhase or (lib.concatStringsSep "\n" ([
     "runHook preBuild"
diff --git a/pkgs/development/compilers/crystal/default.nix b/pkgs/development/compilers/crystal/default.nix
index f682ecfb06c..83c91fc04da 100644
--- a/pkgs/development/compilers/crystal/default.nix
+++ b/pkgs/development/compilers/crystal/default.nix
@@ -145,9 +145,10 @@ let
         export CRYSTAL_CACHE_DIR=$TMP
       '';
 
-      buildInputs = commonBuildInputs extraBuildInputs;
 
+      strictDeps = true;
       nativeBuildInputs = [ binary makeWrapper which pkg-config llvmPackages.llvm ];
+      buildInputs = commonBuildInputs extraBuildInputs;
 
       makeFlags = [
         "CRYSTAL_CONFIG_VERSION=${version}"
diff --git a/pkgs/development/tools/oq/default.nix b/pkgs/development/tools/oq/default.nix
index 32be1251161..d8fcbdf424b 100644
--- a/pkgs/development/tools/oq/default.nix
+++ b/pkgs/development/tools/oq/default.nix
@@ -18,7 +18,8 @@ crystal.buildCrystalPackage rec {
   };
 
   nativeBuildInputs = [ makeWrapper ];
-  buildInputs = [ jq libxml2 ];
+  buildInputs = [ libxml2 ];
+  checkInputs = [ jq ];
 
   format = "shards";
 
diff --git a/pkgs/development/tools/scry/default.nix b/pkgs/development/tools/scry/default.nix
index 04307d02c4a..28a6c09177b 100644
--- a/pkgs/development/tools/scry/default.nix
+++ b/pkgs/development/tools/scry/default.nix
@@ -1,4 +1,4 @@
-{ lib, fetchFromGitHub, crystal, coreutils, makeWrapper }:
+{ lib, fetchFromGitHub, crystal, coreutils, makeWrapper, bash }:
 
 crystal.buildCrystalPackage rec {
   pname = "scry";
@@ -19,6 +19,7 @@ crystal.buildCrystalPackage rec {
   format = "shards";
 
   nativeBuildInputs = [ makeWrapper ];
+  buildInputs = [ bash ];
 
   shardsFile = ./shards.nix;
 
diff --git a/pkgs/tools/misc/kakoune-cr/default.nix b/pkgs/tools/misc/kakoune-cr/default.nix
index 78504c1fc79..3d71482d4ea 100644
--- a/pkgs/tools/misc/kakoune-cr/default.nix
+++ b/pkgs/tools/misc/kakoune-cr/default.nix
@@ -1,4 +1,4 @@
-{ lib, crystal, fetchFromGitHub, fetchurl, jq }:
+{ lib, crystal, fetchFromGitHub, fetchurl, jq, bash }:
 let
   icon = fetchurl {
     url = "https://github.com/mawww/kakoune/raw/master/doc/kakoune_logo.svg";
@@ -16,6 +16,7 @@ crystal.buildCrystalPackage rec {
     hash = "sha256-xFrxbnZl/49vGKdkESPa6LpK0ckq4Jv5GNLL/G0qA1w=";
   };
 
+  buildInputs = [ bash ];
   propagatedUserEnvPkgs = [ jq ];
 
   format = "shards";