diff --git a/src/cmake/ConditionalOption.cmake b/src/cmake/ConditionalOption.cmake
index e60bc56262..f2fdadc54b 100644
--- a/src/cmake/ConditionalOption.cmake
+++ b/src/cmake/ConditionalOption.cmake
@@ -25,6 +25,15 @@ function(av_conditional_option)
         return()
     endif()
 
+    # A condition given as a single quoted string (e.g. IF "A AND NOT B") arrives
+    # as one list element, which if() would treat as the name of a variable.
+    # Split it into separate arguments so that it is evaluated as an expression.
+    # Multi-element conditions are left untouched, so quoted values inside them
+    # (e.g. IF X STREQUAL "a b") keep their spaces.
+    list(LENGTH _co_IF _co_IF_LEN)
+    if(_co_IF_LEN EQUAL 1)
+        separate_arguments(_co_IF)
+    endif()
     if(${_co_IF})
         option(${_co_OPT_NAME} ${_opt_DESCRIPTION} ${_co_THEN})
     else()
diff --git a/src/cmake/DependenciesVersions.cmake b/src/cmake/DependenciesVersions.cmake
index ded88faec7..4e27cf3f5a 100644
--- a/src/cmake/DependenciesVersions.cmake
+++ b/src/cmake/DependenciesVersions.cmake
@@ -114,7 +114,7 @@ set(DEP_LAPACK_URL     "https://github.com/Reference-LAPACK/lapack/archive/v${DE
 set(DEP_LAPACK_HASH    "MD5=595b064fd448b161cd711fe346f498a7")
 
 set(DEP_GMP_VERSION    "6.2.1")
-set(DEP_GMP_URL        "https://gmplib.org/download/gmp/gmp-${DEP_GMP_VERSION}.tar.xz")
+set(DEP_GMP_URL        "https://ftp.gnu.org/gnu/gmp/gmp-${DEP_GMP_VERSION}.tar.xz")
 set(DEP_GMP_HASH       "MD5=0b82665c4a92fd2ade7440c13fcaa42b")
 
 set(DEP_MPFR_VERSION   "4.2.0")
diff --git a/src/cmake/deps/lapack.cmake b/src/cmake/deps/lapack.cmake
index e2baed7aae..734d026f5b 100644
--- a/src/cmake/deps/lapack.cmake
+++ b/src/cmake/deps/lapack.cmake
@@ -24,7 +24,8 @@ if(AV_BUILD_LAPACK)
         ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}/liblapack${CMAKE_SHARED_LIBRARY_SUFFIX}
     )
     set(LAPACK_CMAKE_FLAGS
-        "-DBLAS_LIBRARIES=${BLAS_LIBRARIES} -DLAPACK_LIBRARIES=${LAPACK_LIBRARIES}"
+        -DBLAS_LIBRARIES=${BLAS_LIBRARIES}
+        -DLAPACK_LIBRARIES=${LAPACK_LIBRARIES}
     )
 
 endif()
diff --git a/src/cmake/deps/suitesparse.cmake b/src/cmake/deps/suitesparse.cmake
index 3ddb8ebcc5..b0e9d6d3a8 100644
--- a/src/cmake/deps/suitesparse.cmake
+++ b/src/cmake/deps/suitesparse.cmake
@@ -1,6 +1,6 @@
 # =============================================================================
 # deps/suitesparse.cmake
-# Dependencies: lapack (BLAS_LIBRARIES, LAPACK_LIBRARIES), cuda (optionnel)
+# Dependencies: lapack (BLAS_LIBRARIES, LAPACK_LIBRARIES)
 # Provides:     SUITESPARSE_TARGET, SUITESPARSE_CMAKE_FLAGS
 #
 # NOTE: Requires gmp and mpfr as prerequisites, built inline here since they
@@ -85,9 +85,13 @@ if(AV_BUILD_SUITESPARSE)
     #    )
     #endif()
 
-    if(AV_USE_CUDA)
-        set(_cuda_cmake_flags "-DENABLE_CUDA=ON\ -DCMAKE_CXX_FLAGS=-I${CUDA_TOOLKIT_ROOT_DIR}/include\ -DCMAKE_C_FLAGS=-I${CUDA_TOOLKIT_ROOT_DIR}/include")
+    set(_ss_lapack_flags ${LAPACK_CMAKE_FLAGS})
+    if(_ss_lapack_flags)
+        # SuiteSparse requires BLA_VENDOR along with BLAS_LIBRARIES; the reference BLAS is "Generic"
+        list(APPEND _ss_lapack_flags -DBLA_VENDOR=Generic)
     endif()
+    # SuiteSparse's Makefile takes all CMake options in one space-separated variable
+    list(JOIN _ss_lapack_flags " " _ss_lapack_flags)
 
     ExternalProject_Add(${SUITESPARSE_TARGET}
         URL              ${DEP_SUITESPARSE_URL}
@@ -104,7 +108,7 @@ if(AV_BUILD_SUITESPARSE)
         CONFIGURE_COMMAND ""
         BUILD_COMMAND
             $(MAKE) -j${AV_BUILD_DEPENDENCIES_PARALLEL}
-            CMAKE_OPTIONS=${LAPACK_CMAKE_FLAGS}\ -DCMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX}\ -DCMAKE_INSTALL_LIBDIR=lib\ ${_cuda_cmake_flags}
+            CMAKE_OPTIONS=${_ss_lapack_flags}\ -DCMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX}\ -DCMAKE_INSTALL_LIBDIR=lib\ -DSUITESPARSE_USE_CUDA=OFF
         INSTALL_COMMAND
             $(MAKE) install
         DEPENDS ${LAPACK_TARGET} mpfr
@@ -118,7 +122,7 @@ if(AV_BUILD_SUITESPARSE)
 
     av_register_dep(${SUITESPARSE_TARGET})
 
-    unset(_cuda_cmake_flags)
+    unset(_ss_lapack_flags)
     #unset(_ss_env)
     #unset(_ss_blas)
     #unset(_ss_cmake_opts)