diff --git a/pkgs/applications/science/astronomy/kstars/default.nix b/pkgs/applications/science/astronomy/kstars/default.nix
index 66fc3ec600f8..c32d671cb05d 100644
--- a/pkgs/applications/science/astronomy/kstars/default.nix
+++ b/pkgs/applications/science/astronomy/kstars/default.nix
@@ -9,20 +9,23 @@
 
   eigen, zlib,
 
-  cfitsio, indilib, xplanet, libnova, libraw, gsl, wcslib
+  cfitsio, indilib, xplanet, libnova, libraw, gsl, wcslib, stellarsolver
 }:
 
 mkDerivation rec {
   pname = "kstars";
-  version = "3.4.3";
+  version = "3.5.0";
 
   src = fetchurl {
-    url = "https://mirrors.mit.edu/kde/stable/kstars/kstars-${version}.tar.xz";
-    sha256 = "0j5yxg6ay6sic194skz6vjzg6yvrpb3gvypvs0frjrcjbsl1j4f8";
+    url = "mirror://kde/stable/kstars/kstars-${version}.tar.xz";
+    sha256 = "0fpkm75abn0hhdhfyvpfl6n0fr7gvw63xhb4hvwdrglhkf2nxam1";
   };
 
   patches = [
-    ./indi-fix.patch
+    # Patches ksutils.cpp to use nix store prefixes to find program binaries of
+    # indilib and xplanet dependencies. Without the patch, Ekos is unable to spawn
+    # indi servers for local telescope/camera control.
+    ./fs-fixes.patch
   ];
 
   nativeBuildInputs = [ extra-cmake-modules kdoctools ];
@@ -34,11 +37,12 @@ mkDerivation rec {
 
     eigen zlib
 
-    cfitsio indilib xplanet libnova libraw gsl wcslib
+    cfitsio indilib xplanet libnova libraw gsl wcslib stellarsolver
   ];
 
   cmakeFlags = [
     "-DINDI_NIX_ROOT=${indilib}"
+    "-DXPLANET_NIX_ROOT=${xplanet}"
   ];
 
   meta = with lib; {
@@ -51,6 +55,6 @@ mkDerivation rec {
     '';
     license = licenses.gpl2;
     platforms = platforms.linux;
-    maintainers = with maintainers; [ timput ];
+    maintainers = with maintainers; [ timput hjones2199 ];
   };
 }
diff --git a/pkgs/applications/science/astronomy/kstars/fs-fixes.patch b/pkgs/applications/science/astronomy/kstars/fs-fixes.patch
new file mode 100644
index 000000000000..b9bdfc0c5dea
--- /dev/null
+++ b/pkgs/applications/science/astronomy/kstars/fs-fixes.patch
@@ -0,0 +1,59 @@
+--- kstars-3.5.0/CMakeLists.txt.old	2020-11-24 12:36:37.967433937 -0600
++++ kstars-3.5.0/CMakeLists.txt	2020-11-24 13:36:56.275263691 -0600
+@@ -5,6 +5,9 @@
+ set (KSTARS_BUILD_RELEASE "Stable")
+ set (CMAKE_CXX_STANDARD 11)
+ 
++add_definitions(-DINDI_NIX_ROOT=${INDI_NIX_ROOT})
++add_definitions(-DXPLANET_NIX_ROOT=${XPLANET_NIX_ROOT})
++
+ # Build KStars Lite with -DBUILD_KSTARS_LITE=ON
+ option(BUILD_KSTARS_LITE "Build KStars Lite" OFF)
+ 
+--- kstars-3.5.0/kstars/auxiliary/ksutils.old.cpp	2020-11-24 12:22:14.397319680 -0600
++++ kstars-3.5.0/kstars/auxiliary/ksutils.cpp	2020-11-24 13:32:22.946477798 -0600
+@@ -1081,6 +1081,10 @@
+     // We support running within Snaps, Flatpaks, and AppImage
+     // The path should accomodate the differences between the different
+     // packaging solutions
++    #define STR_EXPAND(x) #x
++    #define STR(x) STR_EXPAND(x)
++    QString indi_prefix = QString(STR(INDI_NIX_ROOT));
++    QString xplanet_prefix = QString(STR(XPLANET_NIX_ROOT));
+     QString snap = QProcessEnvironment::systemEnvironment().value("SNAP");
+     QString flat = QProcessEnvironment::systemEnvironment().value("FLATPAK_DEST");
+     QString appimg = QProcessEnvironment::systemEnvironment().value("APPDIR");
+@@ -1110,21 +1114,21 @@
+ #if defined(Q_OS_OSX)
+         return "/usr/local/bin/indiserver";
+ #endif
+-        return prefix + "/bin/indiserver";
++        return indi_prefix + "/bin/indiserver";
+     }
+     else if (option == "INDIHubAgent")
+     {
+ #if defined(Q_OS_OSX)
+         return "/usr/local/bin/indihub-agent";
+ #endif
+-        return prefix + "/bin/indihub-agent";
++        return indi_prefix + "/bin/indihub-agent";
+     }
+     else if (option == "indiDriversDir")
+     {
+ #if defined(Q_OS_OSX)
+         return "/usr/local/share/indi";
+ #elif defined(Q_OS_LINUX)
+-        return prefix + "/share/indi";
++        return indi_prefix + "/share/indi";
+ #else
+         return QStandardPaths::locate(QStandardPaths::GenericDataLocation, "indi", QStandardPaths::LocateDirectory);
+ #endif
+@@ -1181,7 +1185,7 @@
+ #if defined(Q_OS_OSX)
+         return "/usr/local/bin/xplanet";
+ #endif
+-        return prefix + "/bin/xplanet";
++        return xplanet_prefix + "/bin/xplanet";
+     }
+     else if (option == "ASTAP")
+     {
diff --git a/pkgs/applications/science/astronomy/kstars/indi-fix.patch b/pkgs/applications/science/astronomy/kstars/indi-fix.patch
deleted file mode 100644
index 9ff9f8a31dd3..000000000000
--- a/pkgs/applications/science/astronomy/kstars/indi-fix.patch
+++ /dev/null
@@ -1,50 +0,0 @@
---- CMakeLists.txt	2020-11-02 13:58:06.119743710 -0600
-+++ kstars-3.4.3/CMakeLists.txt	2020-11-02 14:05:01.707799274 -0600
-@@ -4,5 +4,7 @@
- set (KStars_VERSION_REVISION 3)
- set (CMAKE_CXX_STANDARD 11)
- 
-+add_definitions(-DINDI_NIX_ROOT=${INDI_NIX_ROOT})
-+
- # Build KStars Lite with -DBUILD_KSTARS_LITE=ON
- option(BUILD_KSTARS_LITE "Build KStars Lite" OFF)
-
---- ksutils.cpp	2020-11-02 13:47:44.883596916 -0600
-+++ kstars-3.4.3/kstars/auxiliary/ksutils.cpp	2020-11-02 17:41:44.961937090 -0600
-@@ -1076,6 +1076,9 @@
- {
-     QString snap = QProcessEnvironment::systemEnvironment().value("SNAP");
-     QString flat = QProcessEnvironment::systemEnvironment().value("FLATPAK_DEST");
-+#define STR_EXPAND(x) #x
-+#define STR(x) STR_EXPAND(x)
-+    QString nix = QString(STR(INDI_NIX_ROOT));
- 
-     if (option == "fitsDir")
-     {
-@@ -1089,7 +1091,7 @@
-         if (flat.isEmpty() == false)
-             return flat + "/bin/indiserver";
-         else
--            return snap + "/usr/bin/indiserver";
-+            return nix + "/bin/indiserver";
-     }
-     else if (option == "INDIHubAgent")
-     {
-@@ -1099,7 +1101,7 @@
-         if (flat.isEmpty() == false)
-             return flat + "/bin/indihub-agent";
-         else
--            return snap + "/usr/bin/indihub-agent";
-+            return nix + "/bin/indihub-agent";
-     }
-     else if (option == "indiDriversDir")
-     {
-@@ -1109,7 +1111,7 @@
-         if (flat.isEmpty() == false)
-             return flat + "/share/indi";
-         else
--            return snap + "/usr/share/indi";
-+            return nix + "/share/indi";
- #else
-         return QStandardPaths::locate(QStandardPaths::GenericDataLocation, "indi", QStandardPaths::LocateDirectory);
- #endif
diff --git a/pkgs/development/libraries/stellarsolver/default.nix b/pkgs/development/libraries/stellarsolver/default.nix
new file mode 100644
index 000000000000..69417299615b
--- /dev/null
+++ b/pkgs/development/libraries/stellarsolver/default.nix
@@ -0,0 +1,30 @@
+{ stdenv, mkDerivation, fetchFromGitHub, cmake,
+  qtbase, cfitsio, gsl, wcslib, withTester ? false }:
+
+mkDerivation rec {
+  pname = "stellarsolver";
+  version = "1.5";
+
+  src = fetchFromGitHub {
+    owner = "rlancaste";
+    repo = pname;
+    rev = version;
+    sha256 = "12j20j9qbkkx55ix4nm1iw7wd36hamkpidbwhcnmj4yk5fqlyq4y";
+  };
+
+  nativeBuildInputs = [ cmake ];
+
+  buildInputs = [ qtbase cfitsio gsl wcslib ];
+
+  cmakeFlags = [
+    "-DBUILD_TESTER=${if withTester then "on" else "off"}"
+  ];
+
+  meta = with stdenv.lib; {
+    homepage = "https://github.com/rlancaste/stellarsolver";
+    description = "Astrometric plate solving library";
+    license = licenses.gpl3Plus;
+    maintainers = with maintainers; [ hjones2199 ];
+    platforms = [ "x86_64-linux" ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 3e71a52c2341..ab17e2300350 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -27501,6 +27501,8 @@ in
 
   stellarium = libsForQt5.callPackage ../applications/science/astronomy/stellarium { };
 
+  stellarsolver = libsForQt5.callPackage ../development/libraries/stellarsolver { };
+
   astrolabe-generator = callPackage ../applications/science/astronomy/astrolabe-generator { };
 
   tulip = callPackage ../applications/science/misc/tulip {