diff --git a/pkgs/applications/science/astronomy/kstars/default.nix b/pkgs/applications/science/astronomy/kstars/default.nix
index 861dc66293ee..cf3ea143cedf 100644
--- a/pkgs/applications/science/astronomy/kstars/default.nix
+++ b/pkgs/applications/science/astronomy/kstars/default.nix
@@ -14,11 +14,11 @@
 
 mkDerivation rec {
   pname = "kstars";
-  version = "3.5.3";
+  version = "3.5.4";
 
   src = fetchurl {
     url = "mirror://kde/stable/kstars/kstars-${version}.tar.xz";
-    sha256 = "sha256-kgUsG2k2YSAAH7ea2qfGw4gON5CFdUoQ3EwOnATXZ5g=";
+    sha256 = "sha256-JCdSYcogvoUmu+vB/vye+6ZMIJqVoScAKreh89dxoDU=";
   };
 
   nativeBuildInputs = [ extra-cmake-modules kdoctools ];
@@ -33,6 +33,11 @@ mkDerivation rec {
     cfitsio indi-full xplanet libnova libraw gsl wcslib stellarsolver
   ];
 
+  # See https://bugs.kde.org/show_bug.cgi?id=439541
+  preConfigure = ''
+    rm po/de/docs/kstars/index.docbook
+  '';
+
   cmakeFlags = [
     "-DINDI_PREFIX=${indi-full}"
     "-DXPLANET_PREFIX=${xplanet}"
diff --git a/pkgs/development/libraries/science/astronomy/stellarsolver/default.nix b/pkgs/development/libraries/science/astronomy/stellarsolver/default.nix
index c3a63c637c34..191751993c3a 100644
--- a/pkgs/development/libraries/science/astronomy/stellarsolver/default.nix
+++ b/pkgs/development/libraries/science/astronomy/stellarsolver/default.nix
@@ -3,13 +3,13 @@
 
 mkDerivation rec {
   pname = "stellarsolver";
-  version = "1.5";
+  version = "1.8";
 
   src = fetchFromGitHub {
     owner = "rlancaste";
     repo = pname;
     rev = version;
-    sha256 = "12j20j9qbkkx55ix4nm1iw7wd36hamkpidbwhcnmj4yk5fqlyq4y";
+    sha256 = "sha256-eC45V0aqFSUVJrxhaEXFzgzaXkHVwA5Yj8YyGvii0QI=";
   };
 
   nativeBuildInputs = [ cmake ];