diff --git a/pkgs/applications/networking/syncthing012/default.nix b/pkgs/applications/networking/syncthing012/default.nix
index 5735dd68bcd25..4b5359555f4ad 100644
--- a/pkgs/applications/networking/syncthing012/default.nix
+++ b/pkgs/applications/networking/syncthing012/default.nix
@@ -5,8 +5,6 @@ buildGoPackage rec {
   version = "0.12.15";
   rev = "v${version}";
 
-  buildFlags = "--tags noupgrade,release";
-  
   goPackagePath = "github.com/syncthing/syncthing";
 
   src = fetchFromGitHub {
@@ -22,4 +20,8 @@ buildGoPackage rec {
     # Mostly a cosmetic change
     sed -i 's,unknown-dev,${version},g' cmd/syncthing/main.go
   '';
+
+  preBuild = ''
+    export buildFlagsArray+=("-tags" "noupgrade release")
+  '';
 }
diff --git a/pkgs/development/go-modules/generic/default.nix b/pkgs/development/go-modules/generic/default.nix
index c2e4b39472c48..5a1a0eb52eb38 100644
--- a/pkgs/development/go-modules/generic/default.nix
+++ b/pkgs/development/go-modules/generic/default.nix
@@ -123,7 +123,7 @@ go.stdenv.mkDerivation (
       [ -n "$excludedPackages" ] && echo "$d" | grep -q "$excludedPackages" && return 0
       local OUT
       if ! OUT="$(go $cmd $buildFlags "''${buildFlagsArray[@]}" -v $d 2>&1)"; then
-        if ! echo "$OUT" | grep -q 'no buildable Go source files'; then
+        if ! echo "$OUT" | grep -qE '(no( buildable| non-test)?|build constraints exclude all) Go (source )?files'; then
           echo "$OUT" >&2
           return 1
         fi
diff --git a/pkgs/tools/filesystems/gcsfuse/default.nix b/pkgs/tools/filesystems/gcsfuse/default.nix
index 086f0e0f790c8..215f02ccdd4e2 100644
--- a/pkgs/tools/filesystems/gcsfuse/default.nix
+++ b/pkgs/tools/filesystems/gcsfuse/default.nix
@@ -3,15 +3,15 @@
 
 buildGoPackage rec {
   name = "gcsfuse-${version}";
-  version = "v0.19.0";
-  rev = "81281027c0093e3f916a6e611a128ec5c3a12ece";
+  version = "0.23.0";
+  rev = "v${version}";
 
   goPackagePath = "github.com/googlecloudplatform/gcsfuse";
 
   src = fetchgit {
     inherit rev;
     url = "https://github.com/googlecloudplatform/gcsfuse";
-    sha256 = "1lj9czippsgkhr8y3r7vwxgc8i952v76v1shdv10p43gsxwyyi9a";
+    sha256 = "1qxbpsmz22l5w4b7wbgfdq4v85cfc9ka9i8h4c56nals1x5lcsnx";
   };
 
   meta = {
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 4324cc0092f26..0fced3a1bb81b 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -11130,7 +11130,7 @@ with pkgs;
     go = go_1_9;
   };
 
-  buildGoPackage = buildGo18Package;
+  buildGoPackage = buildGo19Package;
 
   go2nix = callPackage ../development/tools/go2nix { };
 
@@ -12017,7 +12017,10 @@ with pkgs;
 
   cifs-utils = callPackage ../os-specific/linux/cifs-utils { };
 
-  cockroachdb = callPackage ../servers/sql/cockroachdb { };
+  cockroachdb = callPackage ../servers/sql/cockroachdb {
+    # Go 1.9 build fails with "go1.8.* required (see CONTRIBUTING.md)".
+    buildGoPackage = buildGo18Package;
+  };
 
   conky = callPackage ../os-specific/linux/conky ({
     lua = lua5_1; # conky can use 5.2, but toluapp can not