diff --git a/pkgs/development/compilers/go/1.14.nix b/pkgs/development/compilers/go/1.14.nix
index 3060e6d4e563..92c1cbdfc18b 100644
--- a/pkgs/development/compilers/go/1.14.nix
+++ b/pkgs/development/compilers/go/1.14.nix
@@ -150,6 +150,13 @@ stdenv.mkDerivation rec {
     ./skip-nohup-tests.patch
     ./go_no_vendor_checks-1_14.patch
 
+    # support TZ environment variable starting with colon
+    (fetchpatch {
+      name = "tz-support-colon.patch";
+      url = "https://github.com/golang/go/commit/58fe2cd4022c77946ce4b598cf3e30ccc8367143.patch";
+      sha256 = "0vphwiqrm0qykfj3rfayr65qzk22fksg7qkamvaz0lmf6fqvbd2f";
+    })
+
     # fix rare TestDontCacheBrokenHTTP2Conn failure
     (fetchpatch {
       url = "https://github.com/golang/go/commit/ea1437a8cdf6bb3c2d2447833a5d06dbd75f7ae4.patch";
diff --git a/pkgs/development/compilers/go/1.15.nix b/pkgs/development/compilers/go/1.15.nix
index 132631040565..4432b1fe895d 100644
--- a/pkgs/development/compilers/go/1.15.nix
+++ b/pkgs/development/compilers/go/1.15.nix
@@ -158,6 +158,13 @@ stdenv.mkDerivation rec {
     ./skip-nohup-tests.patch
     ./skip-cgo-tests-1.15.patch
     ./go_no_vendor_checks.patch
+
+    # support TZ environment variable starting with colon
+    (fetchpatch {
+      name = "tz-support-colon.patch";
+      url = "https://github.com/golang/go/commit/58fe2cd4022c77946ce4b598cf3e30ccc8367143.patch";
+      sha256 = "0vphwiqrm0qykfj3rfayr65qzk22fksg7qkamvaz0lmf6fqvbd2f";
+    })
   ] ++ [
     # breaks under load: https://github.com/golang/go/issues/25628
     (if stdenv.isAarch32