diff --git a/pkgs/development/compilers/marst/default.nix b/pkgs/development/compilers/marst/default.nix
index 8412c149c234..8644fcf7bf43 100644
--- a/pkgs/development/compilers/marst/default.nix
+++ b/pkgs/development/compilers/marst/default.nix
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
   version = "2.7";
 
   src = fetchurl {
-    url = "mirror://gnu/gnu/${pname}/${pname}-${version}.tar.gz";
+    url = "mirror://gnu/${pname}/${pname}-${version}.tar.gz";
     hash = "sha256-Pue50cvjzZ+19iJxfae7VQbxpto7MPgS4jhLh7zk2lA=";
   };
 
diff --git a/pkgs/development/libraries/libidn2/default.nix b/pkgs/development/libraries/libidn2/default.nix
index 9d7babd01dd2..d76f30488151 100644
--- a/pkgs/development/libraries/libidn2/default.nix
+++ b/pkgs/development/libraries/libidn2/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   version = "2.3.2";
 
   src = fetchurl {
-    url = "mirror://gnu/gnu/libidn/${pname}-${version}.tar.gz";
+    url = "mirror://gnu/libidn/${pname}-${version}.tar.gz";
     sha256 = "sha256-dpQM1Od46Ak1eanRlbJf/16Tbp3GJCBoUotDenZ2T5E=";
   };
 
diff --git a/pkgs/development/tools/mdk/default.nix b/pkgs/development/tools/mdk/default.nix
index 30ae23e85a8d..7345540b51b2 100644
--- a/pkgs/development/tools/mdk/default.nix
+++ b/pkgs/development/tools/mdk/default.nix
@@ -4,7 +4,7 @@ stdenv.mkDerivation rec {
   pname = "gnu-mdk";
   version = "1.3.0";
   src = fetchurl {
-    url = "mirror://gnu/gnu/mdk/v${version}/mdk-${version}.tar.gz";
+    url = "mirror://gnu/mdk/v${version}/mdk-${version}.tar.gz";
     sha256 = "0bhk3c82kyp8167h71vdpbcr852h5blpnwggcswqqwvvykbms7lb";
   };
   nativeBuildInputs = [ pkg-config intltool ];