skopeo: 0.1.29 -> 0.1.30

Skopeo used by our docker tools was patched to work in the build
sandbox (it used /var/tmp which is not available in the sandbox).
Since this temporary directory can now be set at build time, we remove
the patch from our docker tools.

pkgs/development/tools/skopeo/default.nix

@@ -5,13 +5,13 @@
 with stdenv.lib;
 
 let
-  version = "0.1.29";
+  version = "0.1.30";
 
   src = fetchFromGitHub {
     rev = "v${version}";
     owner = "projectatomic";
     repo = "skopeo";
-    sha256 = "1lhzbyj2mm25x12s7g2jx4v8w19izjwlgx4lml13r5yy1spn65k2";
+    sha256 = "10lpiiki7mlhrp4bid40wys3lch7fars1whxsa5gy0frfgp89ghn";
   };
 
   defaultPolicyFile = runCommand "skopeo-default-policy.json" {} "cp ${src}/default-policy.json $out";
@@ -30,7 +30,11 @@ buildGoPackage rec {
   nativeBuildInputs = [ pkgconfig (lib.getBin go-md2man) ];
   buildInputs = [ gpgme libgpgerror devicemapper btrfs-progs ostree libselinux ];
 
-  buildFlagsArray = "-ldflags= -X github.com/projectatomic/skopeo/vendor/github.com/containers/image/signature.systemDefaultPolicyPath=${defaultPolicyFile}";
+  buildFlagsArray = ''
+    -ldflags=
+    -X github.com/projectatomic/skopeo/vendor/github.com/containers/image/signature.systemDefaultPolicyPath=${defaultPolicyFile}
+    -X github.com/projectatomic/skopeo/vendor/github.com/containers/image/internal/tmpdir.unixTempDirForBigFiles=/tmp
+  '';
 
   preBuild = ''
     export CGO_CFLAGS="-I${getDev gpgme}/include -I${getDev libgpgerror}/include -I${getDev devicemapper}/include -I${getDev btrfs-progs}/include"