diff --git a/var/spack/repos/builtin/packages/exago/package.py b/var/spack/repos/builtin/packages/exago/package.py
index c786877916..ab48bab377 100644
--- a/var/spack/repos/builtin/packages/exago/package.py
+++ b/var/spack/repos/builtin/packages/exago/package.py
@@ -17,20 +17,36 @@ class Exago(CMakePackage, CudaPackage, ROCmPackage):
     git = "https://github.com/pnnl/ExaGO.git"
     maintainers("ryandanehy", "cameronrutherford", "pelesh")
 
+    version(
+        "1.6.0", tag="v1.6.0", commit="159cd173572280ac0f6f094a71dcc3ebeeb34076", submodules=True
+    )
     version(
         "1.5.1", tag="v1.5.1", commit="84e9faf9d9dad8d851075eba26038338d90e6d3a", submodules=True
     )
-    version("1.5.0", commit="227f49573a28bdd234be5500b3733be78a958f15", submodules=True)
-    version("1.4.1", commit="ea607c685444b5f345bfdc9a59c345f0f30adde2", submodules=True)
-    version("1.4.0", commit="4f4c3fdb40b52ace2d6ba000e7f24b340ec8e886", submodules=True)
-    version("1.3.0", commit="58b039d746a6eac8e84b0afc01354cd58caec485", submodules=True)
-    version("1.2.0", commit="255a214ec747b7bdde7a6d8151c083067b4d0907", submodules=True)
-    version("1.1.2", commit="db3bb16e19c09e01402071623258dae4d13e5133", submodules=True)
-    version("1.1.1", commit="0e0a3f27604876749d47c06ec71daaca4b270df9", submodules=True)
-    version("1.1.0", commit="dc8dd85544ff1b55a64a3cbbbdf12b8a0c6fdaf6", submodules=True)
-    version("1.0.0", commit="230d7df2f384f68b952a1ea03aad41431eaad283")
-    version("0.99.2", commit="56961641f50827b3aa4c14524f2f978dc48b9ce5")
-    version("0.99.1", commit="0ae426c76651ba5a9dbcaeb95f18d1b8ba961690")
+    version(
+        "1.5.0", tag="v1.5.0", commit="227f49573a28bdd234be5500b3733be78a958f15", submodules=True
+    )
+    version(
+        "1.4.1", tag="v1.4.1", commit="ea607c685444b5f345bfdc9a59c345f0f30adde2", submodules=True
+    )
+    version(
+        "1.4.0", tag="v1.4.0", commit="4f4c3fdb40b52ace2d6ba000e7f24b340ec8e886", submodules=True
+    )
+    version(
+        "1.3.0", tag="v1.3.0", commit="58b039d746a6eac8e84b0afc01354cd58caec485", submodules=True
+    )
+    version(
+        "1.1.2", tag="v1.1.2", commit="db3bb16e19c09e01402071623258dae4d13e5133", submodules=True
+    )
+    version(
+        "1.1.1", tag="v1.1.1", commit="0e0a3f27604876749d47c06ec71daaca4b270df9", submodules=True
+    )
+    version(
+        "1.1.0", tag="v1.1.0", commit="dc8dd85544ff1b55a64a3cbbbdf12b8a0c6fdaf6", submodules=True
+    )
+    version("1.0.0", tag="v1.0.0", commit="230d7df2f384f68b952a1ea03aad41431eaad283")
+    version("0.99.2", tag="v0.99.2", commit="56961641f50827b3aa4c14524f2f978dc48b9ce5")
+    version("0.99.1", tag="v0.99.1", commit="0ae426c76651ba5a9dbcaeb95f18d1b8ba961690")
     version("main", branch="main", submodules=True)
     version("develop", branch="develop", submodules=True)
     version(
@@ -49,7 +65,6 @@ class Exago(CMakePackage, CudaPackage, ROCmPackage):
     conflicts(
         "+python", when="+ipopt+rocm", msg="Python bindings require -fPIC with Ipopt for rocm."
     )
-    variant("logging", default=False, description="Enable/Disable spdlog based logging")
 
     # Solver options
     variant("hiop", default=False, description="Enable/Disable HiOp")
@@ -64,7 +79,12 @@ class Exago(CMakePackage, CudaPackage, ROCmPackage):
         "~hiop~ipopt+python @:1.5.0",
         msg="ExaGO Python wrapper requires at least one solver enabled.",
     )
-
+    conflicts(
+        "+hiop~mpi ^hiop@1.0.0:~mpi",
+        when="@1.5.1:1.6.1",
+        msg="#18 - builds with hiop and without MPI cause compile time errors",
+    )
+    conflicts("+python~mpi", msg="#16 - Python wrapper requires MPI enabled")
     # Dependencies
     depends_on("python@3.6:3.10", when="@1.3.0:1.5+python")
     depends_on("py-pytest", type=("build", "run"), when="@1.5.0:+python")
@@ -76,7 +96,6 @@ class Exago(CMakePackage, CudaPackage, ROCmPackage):
     depends_on("cuda", when="+cuda")
     depends_on("raja", when="+raja")
     depends_on("umpire", when="+raja")
-
     depends_on("cmake@3.18:", type="build")
 
     # Profiling
@@ -117,7 +136,7 @@ class Exago(CMakePackage, CudaPackage, ROCmPackage):
     depends_on("hiop@0.3.99:", when="@0.99:+hiop")
     depends_on("hiop@0.5.1:", when="@1.1.0:+hiop")
     depends_on("hiop@0.5.3:", when="@1.3.0:+hiop")
-    depends_on("hiop@0.7.0:", when="@1.5.0:+hiop")
+    depends_on("hiop@0.7.0:1.0.0", when="@1.5.0:+hiop")
 
     depends_on("hiop~mpi", when="+hiop~mpi")
     depends_on("hiop+mpi", when="+hiop+mpi")
@@ -191,7 +210,6 @@ def cmake_args(self):
                 self.define_from_variant("EXAGO_ENABLE_HIOP", "hiop"),
                 self.define_from_variant("EXAGO_ENABLE_IPOPT", "ipopt"),
                 self.define_from_variant("EXAGO_ENABLE_PYTHON", "python"),
-                self.define_from_variant("EXAGO_ENABLE_LOGGING", "logging"),
             ]
         )